{"id":94044,"date":"2026-03-27T12:06:34","date_gmt":"2026-03-27T06:36:34","guid":{"rendered":"https:\/\/www.oliveboard.in\/blog\/?p=94044"},"modified":"2026-03-27T12:08:11","modified_gmt":"2026-03-27T06:38:11","slug":"number-system-questions-for-ssc-cgl","status":"publish","type":"post","link":"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/","title":{"rendered":"Number System Questions for SSC CGL, Attempt Live &amp; Download PDF"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_77 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of content<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Download_Number_System_Quiz_PDF_for_SSC_CGL\" >Download Number System Quiz PDF for SSC CGL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Practice_SSC_CGL_Number_System_Questions_Live\" >Practice SSC CGL Number System Questions (Live)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Sign_Up\" >Sign Up<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Login\" >Login<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Forgot_Password\" >Forgot Password<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#i\" >&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Practice_SSC_CGL_Number_System_Questions_Set_2\" >Practice SSC CGL Number System Questions (Set 2)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Sign_Up-2\" >Sign Up<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Login-2\" >Login<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Forgot_Password-2\" >Forgot Password<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#i-2\" >&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#SSC_Number_System_Key_Concepts_and_Types_of_Questions\" >SSC Number System: Key Concepts and Types of Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Number_System_Questions_for_SSC_CGL_Concept_Examples\" >Number System Questions for SSC CGL: Concept &amp; Examples<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Tips_to_Prepare_for_Number_System_in_SSC_CGL\" >Tips to Prepare for Number System in SSC CGL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#Common_Mistakes_Made_by_Students_in_SSC_CGL_Number_System_Questions\" >Common Mistakes Made by Students in SSC CGL Number System Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#SSC_CGL_Number_System_%E2%80%93_FAQs\" >SSC CGL Number System \u2013 FAQs<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Number System is a fundamental topic in SSC CGL Quant, and questions are usually concept-based but easy to solve with proper practice. Questions are asked from topics like divisibility rules, HCF &amp; LCM, remainders, unit digits, factors &amp; multiples, prime numbers, and cyclicity. With regular practice, you can significantly improve your speed and precision. In this blog, you will find 30 important SSC CGL Number System Quiz and a free E-book with 100 MCQs for download. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-download-number-system-quiz-pdf-for-ssc-cgl\"><span class=\"ez-toc-section\" id=\"Download_Number_System_Quiz_PDF_for_SSC_CGL\"><\/span>Download Number System Quiz PDF for SSC CGL<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><br>You can download the SSC CGL Number System Questions eBook PDF from the link given below. The PDF contains 100 important number system questions with answers for quick practice and revision. These questions are highly useful for candidates preparing for the SSC CGL Exam.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/number-system-questions-for-ssc-cgl-pdf\/?ref=contmk-blog-nsq\" target=\"_blank\" rel=\"noreferrer noopener\">Download Number System Quiz PDF for SSC CGL<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-practice-ssc-cgl-number-system-questions-live\"><span class=\"ez-toc-section\" id=\"Practice_SSC_CGL_Number_System_Questions_Live\"><\/span>Practice SSC CGL Number System Questions (Live)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><br>Below are some number system questions for SSC CGL for your practice. Attempt them live and check your score as per the real exam marking scheme. You will get +1 for every correct answer, \u22120.25 for every wrong answer, and 0 for unattempted questions.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"UTF-8\">\n<link rel=\"stylesheet\" href=\"https:\/\/courses.oliveboard.in\/edge\/css\/login-modal-for-blog.css\">\n\n<style>\n#quiz-1-sticky-header {\n  position: sticky;\n  top: 0;\n  z-index: 100;\n  background: #1565c0;\n  color: #fff;\n  padding: 12px 20px;\n  border-radius: 10px 10px 0 0;\n  display: flex;\n  justify-content: space-between;\n  align-items: center;\n  font-size: 16px;\n  font-weight: bold;\n  box-shadow: 0 2px 8px rgba(0,0,0,0.2);\n  margin: -20px -20px 20px -20px;\n}\n\n#quiz-1-score-badge {\n  background: rgba(255,255,255,0.2);\n  padding: 4px 12px;\n  border-radius: 20px;\n  font-size: 15px;\n  white-space: nowrap;\n}\n#quiz-1 * { box-sizing: border-box; }\n\n#quiz-1 .quiz-container {\n  max-width: 700px;\n  margin: auto;\n  padding: 20px;\n  background: #fff;\n  border-radius: 14px;\n  box-shadow: 0 6px 16px rgba(0,0,0,0.12);\n}\n\n#quiz-1 h2 {\n  text-align: center;\n}\n\n#quiz-1 .question {\n  margin-bottom: 22px;\n}\n\n#quiz-1 .question p {\n  font-weight: bold;\n}\n\n#quiz-1 button {\n  width: 100%;\n  padding: 12px;\n  margin: 6px 0;\n  border: none;\n  border-radius: 6px;\n  background: #e0e0e0;\n  color: #000;\n  font-size: 16px;\n  cursor: pointer;\n}\n\n#quiz-1 button:hover {\n  background: #d5d5d5;\n}\n\n#quiz-1 button.correct {\n  background: #4caf50;\n  color: #000;\n}\n\n#quiz-1 button.wrong {\n  background: #f44336;\n  color: #000;\n}\n\n#quiz-1 button.locked {\n  pointer-events: none;\n}\n\n\/* SUMMARY *\/\n#quiz-1 .final-summary {\n  margin-top: 40px;\n  padding: 20px;\n  border-radius: 14px;\n  background: #fafafa;\n  border: 2px solid #4caf50;\n}\n\n#quiz-1 .final-summary h3 {\n  text-align: center;\n  margin-bottom: 20px;\n}\n\n#quiz-1 .summary-row {\n  display: grid;\n  grid-template-columns: 120px 1fr 40px;\n  gap: 10px;\n  align-items: center;\n  margin-bottom: 12px;\n  font-weight: bold;\n}\n\n#quiz-1 .summary-bar {\n  height: 14px;\n  background: #ddd;\n  border-radius: 10px;\n  overflow: hidden;\n}\n\n#quiz-1 .bar-fill {\n  height: 100%;\n  width: 0%;\n}\n\n#quiz-1 .bar-attempted { background: #2196f3; }\n#quiz-1 .bar-correct { background: #4caf50; }\n#quiz-1 .bar-wrong { background: #f44336; }\n#quiz-1 .bar-unattempted { background: #9e9e9e; width: 100%; }\n\n#quiz-1 .final-score {\n  text-align: center;\n  font-size: 22px;\n  margin-top: 20px;\n}\n\n#quiz-1 .score-value {\n  font-size: 30px;\n  margin-left: 8px;\n}\n<\/style>\n<\/head>\n\n<body>\n<div id=\"quiz-1\">\n  <div class=\"quiz-container\">\n<div id=\"quiz-1-sticky-header\">\n  <span> SSC CGL Number System Questions <\/span>\n  <span id=\"quiz-1-score-badge\">Score: <strong id=\"quiz-1-score-value\">0.00<\/strong><\/span>\n<\/div>\n\n    <!-- QUESTIONS -->\n\n<div class=\"question\" data-answered=\"false\">\n  <p>1. The sum of three consecutive natural numbers each divisible by 3 is 72. What is the largest among them?<\/p>\n  <button data-correct=\"true\">A) 27<\/button>\n  <button data-correct=\"false\">B) 25<\/button>\n  <button data-correct=\"false\">C) 30<\/button>\n  <button data-correct=\"false\">D) 26<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>2. How many numbers between 1000 and 5000 are exactly divisible by 225?<\/p>\n  <button data-correct=\"false\">A) 12<\/button>\n  <button data-correct=\"true\">B) 15<\/button>\n  <button data-correct=\"false\">C) 18<\/button>\n  <button data-correct=\"false\">D) 20<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>3. Two numbers differ by 5. If their product is 336, the sum of the two numbers is:<\/p>\n  <button data-correct=\"false\">A) 51<\/button>\n  <button data-correct=\"false\">B) 37<\/button>\n  <button data-correct=\"true\">C) 31<\/button>\n  <button data-correct=\"false\">D) 26<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>4. When a number is divided by 56, the remainder obtained is 29. What will be the remainder when the number is divided by 8?<\/p>\n  <button data-correct=\"true\">A) 5<\/button>\n  <button data-correct=\"false\">B) 3<\/button>\n  <button data-correct=\"false\">C) 4<\/button>\n  <button data-correct=\"false\">D) 7<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>5. The digits of a two-digit number are in the ratio of 2:3 and the number obtained by interchanging the digits is bigger than the original number by 27. What is the original number?<\/p>\n  <button data-correct=\"false\">A) 36<\/button>\n  <button data-correct=\"true\">B) 48<\/button>\n  <button data-correct=\"false\">C) 69<\/button>\n  <button data-correct=\"false\">D) 98<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>6. What is the smallest number that must be added to 1032 to make it divisible by 6?<\/p>\n  <button data-correct=\"true\">A) 2<\/button>\n  <button data-correct=\"false\">B) 3<\/button>\n  <button data-correct=\"false\">C) 4<\/button>\n  <button data-correct=\"false\">D) 5<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>7. Find the least number which when divided by 12, 15, and 20 leaves a remainder of 3 in each case.<\/p>\n  <button data-correct=\"true\">A) 243<\/button>\n  <button data-correct=\"false\">B) 253<\/button>\n  <button data-correct=\"false\">C) 263<\/button>\n  <button data-correct=\"false\">D) 273<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>8. If a number leaves a remainder 1 when divided by 3, 4, and 5, what is the least such number?<\/p>\n  <button data-correct=\"true\">A) 61<\/button>\n  <button data-correct=\"false\">B) 121<\/button>\n  <button data-correct=\"false\">C) 41<\/button>\n  <button data-correct=\"false\">D) 81<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>9. The unit digit of the product 237 \u00d7 189 \u00d7 543 is:<\/p>\n  <button data-correct=\"false\">A) 9<\/button>\n  <button data-correct=\"true\">B) 3<\/button>\n  <button data-correct=\"false\">C) 7<\/button>\n  <button data-correct=\"false\">D) 1<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>10. What is the greatest 3-digit number divisible by 24, 36, and 54?<\/p>\n  <button data-correct=\"false\">A) 972<\/button>\n  <button data-correct=\"false\">B) 984<\/button>\n  <button data-correct=\"true\">C) 936<\/button>\n  <button data-correct=\"false\">D) 888<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>11. How many 3-digit numbers are divisible by 11?<\/p>\n  <button data-correct=\"false\">A) 81<\/button>\n  <button data-correct=\"true\">B) 82<\/button>\n  <button data-correct=\"false\">C) 90<\/button>\n  <button data-correct=\"false\">D) 91<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>12. If 4A7 is divisible by 11, what is the value of A?<\/p>\n  <button data-correct=\"false\">A) 4<\/button>\n  <button data-correct=\"false\">B) 5<\/button>\n  <button data-correct=\"true\">C) 6<\/button>\n  <button data-correct=\"false\">D) 7<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>13. A number when divided by 13 leaves a remainder of 5. What is the remainder when twice that number is divided by 13?<\/p>\n  <button data-correct=\"false\">A) 10<\/button>\n  <button data-correct=\"false\">B) 3<\/button>\n  <button data-correct=\"true\">C) 11<\/button>\n  <button data-correct=\"false\">D) 4<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>14. Which one of the following is not a prime number?<\/p>\n  <button data-correct=\"false\">A) 191<\/button>\n  <button data-correct=\"false\">B) 223<\/button>\n  <button data-correct=\"true\">C) 221<\/button>\n  <button data-correct=\"false\">D) 211<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>15. What is the smallest number that is exactly divisible by 6, 8, 12 and 15?<\/p>\n  <button data-correct=\"false\">A) 120<\/button>\n  <button data-correct=\"false\">B) 240<\/button>\n  <button data-correct=\"true\">C) 360<\/button>\n  <button data-correct=\"false\">D) 180<\/button>\n<\/div>\n    <!-- FINAL SUMMARY -->\n    <div class=\"final-summary\">\n      <h3>Quiz Summary <\/h3>\n\n      <div class=\"summary-row\">\n        <span>Attempted<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-attempted\" data-summary=\"attempted\"><\/div><\/div>\n        <span data-count=\"attempted\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Correct<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-correct\" data-summary=\"correct\"><\/div><\/div>\n        <span data-count=\"correct\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Wrong<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-wrong\" data-summary=\"wrong\"><\/div><\/div>\n        <span data-count=\"wrong\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Unattempted<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-unattempted\" data-summary=\"unattempted\"><\/div><\/div>\n        <span data-count=\"unattempted\">0<\/span>\n      <\/div>\n\n      <div class=\"final-score\">\n        Final Score: <span class=\"score-value\" data-score>0.0<\/span>\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/div>\n<div class=\"modal modal-obls\" id=\"modal-signup\">\n        <div class=\"modal-background\"><\/div>\n        <div class=\"modal-content\">\n           <div class=\"obls-group\" id=\"obls-group1\">\n               <div class=\"obls-blk\">\n                   <span class=\"img-box\"><img decoding=\"async\" src=\"\/img\/img-delivery.svg\" alt=\"\"><\/span>\n                   <h2 id=\"display-register-text\"><span class=\"ez-toc-section\" id=\"Sign_Up\"><\/span>Sign Up<span class=\"ez-toc-section-end\"><\/span><\/h2>\n                   <div class=\"loginas-group loginas-group1 loginas-group-single\">\n <div id=\"g_id_onload\" data-client_id=\"506321490093-i3j96ah9gn1sv3khntnd1rnv5jebt5j4.apps.googleusercontent.com\" ,=\"\" data-use_fedcm_for_prompt=\"true\" data-callback=\"handleOnetapResponse\">\n    <\/div>\n    <div class=\"g_id_signin\" data-type=\"standard\"><div class=\"S9gUrf-YoZ4jf\" style=\"position: relative;\"><div><\/div><iframe src=\"https:\/\/accounts.google.com\/gsi\/button?type=standard&amp;is_fedcm_supported=true&amp;client_id=506321490093-i3j96ah9gn1sv3khntnd1rnv5jebt5j4.apps.googleusercontent.com&amp;iframe_id=gsi_437394_8652&amp;cas=pwXumGxyCMNtIbjaV30qchi2A1vUar%2Faz%2FOE5HQ%2B0Zc\" class=\"L5Fo6c-PQbLGe\" allow=\"identity-credentials-get\" id=\"gsi_437394_8652\" title=\"Sign in with Google Button\" style=\"display: block; position: relative; top: 0px; left: 0px; height: 44px; width: 204px; border: 0px; margin: -2px -10px;\"><\/iframe><\/div><\/div>\n                   <\/div>\n                   <h6 class=\"signup-subheader\">Or, register with email<\/h6>\n                   <label class=\"errormsg txt-red courseUp\"><\/label>\n                   <div class=\"formcontrol-group\">\n                        <span class=\"icon\"><img decoding=\"async\" src=\"\/img\/ic-mail.svg\" alt=\"\"><\/span>\n                        <input type=\"email\" name=\"email\" class=\"formcontrol ob-inputfield\" id=\"course-uemail\" required=\"\">\n                        <span class=\"floating-label\" style=\"top: 19px; font-size: 12px;\">Email Id<\/span>\n                   <\/div>\n                   <div class=\"formcontrol-group\">\n                        <span class=\"icon\"><img decoding=\"async\" src=\"\/img\/ic-mobile-black.svg\" alt=\"\"><\/span>\n                        <input type=\"text\" maxlength=\"10\" name=\"monum\" class=\"formcontrol ob-inputfield\" id=\"course-uphone\" 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Opens in new tab<\/span><\/div><\/div><\/div><iframe src=\"https:\/\/accounts.google.com\/gsi\/button?type=standard&amp;is_fedcm_supported=true&amp;client_id=506321490093-i3j96ah9gn1sv3khntnd1rnv5jebt5j4.apps.googleusercontent.com&amp;iframe_id=gsi_437400_306436&amp;cas=pwXumGxyCMNtIbjaV30qchi2A1vUar%2Faz%2FOE5HQ%2B0Zc\" class=\"L5Fo6c-PQbLGe\" allow=\"identity-credentials-get\" id=\"gsi_437400_306436\" title=\"Sign in with Google Button\" style=\"display: block; position: relative; top: 0px; left: 0px; height: 0px; width: 0px; border: 0px;\"><\/iframe><\/div><\/div>\n\n\n                   <\/div>\n                    <p class=\"obls-footer\">New to Oliveboard?<button class=\"btn btn-xs btn-switch-obls\" id=\"btn-show-modal-signup\">Register<\/button><\/p>\n               <\/div> \n            <\/div> \n            <div class=\"success-msg-group\" id=\"success-msg-group\"><!-- success msg -->\n                <div class=\"success-msg-blk\" id=\"success-msg-blk\">\n                    <span class=\"img-box\"><img decoding=\"async\" src=\"\/img\/success-ellipse.svg\" alt=\"\"><\/span>\n                    <h2 id=\"fpwd-success-msg-title\"><span class=\"ez-toc-section\" id=\"i\"><\/span>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n                    <p id=\"fpwd-success-msg-text\">&nbsp;<\/p>\n                    <div class=\"login-btn\">\n                        <button type=\"button\" class=\"btn btn-md btn-tblue modal-obls-close\">Ok<\/button>\n                    <\/div>\n\n                <\/div>\n            <\/div><!-- success msg -->\n\n        <\/div>\n        <button class=\"modal-close is-large modal-obls-close\" aria-label=\"close\"><\/button>\n    <\/div>\n\n<script src=\"https:\/\/s3-ap-southeast-1.amazonaws.com\/sg2.oliveboard.in\/static\/js\/jquery.js\"><\/script>\n\n<script>\nvar boxurl = window.location.href + '?log=1';\n\nfunction getUrlParam(name, defaultValue) {\n    const params = new URLSearchParams(window.location.search);\n    return params.has(name) ? params.get(name) : defaultValue;\n}\n\nvar l_log = getUrlParam('log', 0);\n<\/script>\n<script src=\"https:\/\/www.oliveboard.in\/js\/coursecommon.js?v=12\"><\/script>\n\n\n<script>\n(() => {\n  const quizContainer = document.getElementById('quiz-1');\n  const STORAGE_KEY = 'quiz_1_state';\n  let score = 0;\n  let attempted = 0;\n  let correct = 0;\n  let wrong = 0;\n\n  const questions = quizContainer.querySelectorAll(\".question\");\n  const total = questions.length;\n\n  function loadState() {\n    try { return JSON.parse(sessionStorage.getItem(STORAGE_KEY) || '{}'); }\n    catch { return {}; }\n  }\n\n  function saveState(data) {\n    sessionStorage.setItem(STORAGE_KEY, JSON.stringify(data));\n  }\n\n  function updateUI() {\n    const unattempted = total - attempted;\n    quizContainer.querySelector('[data-count=\"attempted\"]').textContent = attempted;\n    quizContainer.querySelector('[data-count=\"correct\"]').textContent = correct;\n    quizContainer.querySelector('[data-count=\"wrong\"]').textContent = wrong;\n    quizContainer.querySelector('[data-count=\"unattempted\"]').textContent = unattempted;\n    quizContainer.querySelector('[data-summary=\"attempted\"]').style.width = (attempted \/ total) * 100 + \"%\";\n    quizContainer.querySelector('[data-summary=\"correct\"]').style.width = (correct \/ total) * 100 + \"%\";\n    quizContainer.querySelector('[data-summary=\"wrong\"]').style.width = (wrong \/ total) * 100 + \"%\";\n    quizContainer.querySelector('[data-summary=\"unattempted\"]').style.width = (unattempted \/ total) * 100 + \"%\";\n    quizContainer.querySelector('[data-score]').textContent = score.toFixed(2);\n\n    \/\/ Live score update in sticky header\n    document.getElementById('quiz-1-score-value').textContent = score.toFixed(2);\n  }\n\n  function restoreQuestion(q, chosenIndex, wasCorrect) {\n    q.dataset.answered = \"true\";\n    const buttons = q.querySelectorAll(\"button\");\n    buttons.forEach(b => b.classList.add(\"locked\"));\n    if (wasCorrect) {\n      buttons[chosenIndex].classList.add(\"correct\");\n    } else {\n      buttons[chosenIndex].classList.add(\"wrong\");\n      q.querySelector(\"[data-correct='true']\").classList.add(\"correct\");\n    }\n  }\n\n  \/\/ Restore saved answers on page load\n  const savedAnswers = loadState();\nquestions.forEach((q, qIndex) => {\n    const saved = savedAnswers[qIndex];\n    if (saved !== undefined) {\n      attempted++;\n      if (saved.correct) { correct++; }\n      else { wrong++; }\n      restoreQuestion(q, saved.chosenIndex, saved.correct);\n    }\n  });\n  score = parseFloat((correct * 1 - wrong * 0.25).toFixed(2));\n  updateUI();\n\n  \/\/ Attach click handlers\n  questions.forEach((q, qIndex) => {\n    q.querySelectorAll(\"button\").forEach((btn, btnIndex) => {\n      btn.addEventListener(\"click\", () => {\n        if (q.dataset.answered === \"true\") return;\n        q.dataset.answered = \"true\";\n        attempted++;\n\n        if (attempted > 5 && l_log == 0) {\n          $('#modal-signup').addClass('is-active');\n        }\n\n        q.querySelectorAll(\"button\").forEach(b => b.classList.add(\"locked\"));\n        const isCorrect = btn.dataset.correct === \"true\";\n\n if (isCorrect) {\n          btn.classList.add(\"correct\");\n          correct++;\n        } else {\n          btn.classList.add(\"wrong\");\n          wrong++;\n          q.querySelector(\"[data-correct='true']\").classList.add(\"correct\");\n        }\n        score = parseFloat((correct * 1 - wrong * 0.25).toFixed(2));\n\n        savedAnswers[qIndex] = { chosenIndex: btnIndex, correct: isCorrect };\n        saveState(savedAnswers);\n        updateUI();\n      });\n    });\n  });\n\n  updateUI();\n})();\n<\/script>\n\n<\/body>\n<\/html>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-cgl-tier-1-pyps\/?ref=contmk-blog-nsq\" target=\"_blank\" rel=\"noreferrer noopener\">Download SSC CGL Previous year Question papers<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-practice-ssc-cgl-number-system-questions-set-2\"><span class=\"ez-toc-section\" id=\"Practice_SSC_CGL_Number_System_Questions_Set_2\"><\/span>Practice SSC CGL Number System Questions (Set 2)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Below are some more  SSC CGL Number System based MCQs for practice:<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"UTF-8\">\n<link rel=\"stylesheet\" href=\"https:\/\/courses.oliveboard.in\/edge\/css\/login-modal-for-blog.css\">\n\n<style>\n#quiz-2-sticky-header {\n  position: sticky;\n  top: 0;\n  z-index: 100;\n  background: #1565c0;\n  color: #fff;\n  padding: 12px 20px;\n  border-radius: 10px 10px 0 0;\n  display: flex;\n  justify-content: space-between;\n  align-items: center;\n  font-size: 16px;\n  font-weight: bold;\n  box-shadow: 0 2px 8px rgba(0,0,0,0.2);\n  margin: -20px -20px 20px -20px;\n}\n\n#quiz-2-score-badge {\n  background: rgba(255,255,255,0.2);\n  padding: 4px 12px;\n  border-radius: 20px;\n  font-size: 15px;\n  white-space: nowrap;\n}\n#quiz-2 * { box-sizing: border-box; }\n\n#quiz-2 .quiz-container {\n  max-width: 700px;\n  margin: auto;\n  padding: 20px;\n  background: #fff;\n  border-radius: 14px;\n  box-shadow: 0 6px 16px rgba(0,0,0,0.12);\n}\n\n#quiz-2 h2 {\n  text-align: center;\n}\n\n#quiz-2 .question {\n  margin-bottom: 22px;\n}\n\n#quiz-2 .question p {\n  font-weight: bold;\n}\n\n#quiz-2 button {\n  width: 100%;\n  padding: 12px;\n  margin: 6px 0;\n  border: none;\n  border-radius: 6px;\n  background: #e0e0e0;\n  color: #000;\n  font-size: 16px;\n  cursor: pointer;\n}\n\n#quiz-2 button:hover {\n  background: #d5d5d5;\n}\n\n#quiz-2 button.correct {\n  background: #4caf50;\n  color: #000;\n}\n\n#quiz-2 button.wrong {\n  background: #f44336;\n  color: #000;\n}\n\n#quiz-2 button.locked {\n  pointer-events: none;\n}\n\n\/* SUMMARY *\/\n#quiz-2 .final-summary {\n  margin-top: 40px;\n  padding: 20px;\n  border-radius: 14px;\n  background: #fafafa;\n  border: 2px solid #4caf50;\n}\n\n#quiz-2 .final-summary h3 {\n  text-align: center;\n  margin-bottom: 20px;\n}\n\n#quiz-2 .summary-row {\n  display: grid;\n  grid-template-columns: 120px 1fr 40px;\n  gap: 10px;\n  align-items: center;\n  margin-bottom: 12px;\n  font-weight: bold;\n}\n\n#quiz-2 .summary-bar {\n  height: 14px;\n  background: #ddd;\n  border-radius: 10px;\n  overflow: hidden;\n}\n\n#quiz-2 .bar-fill {\n  height: 100%;\n  width: 0%;\n}\n\n#quiz-2 .bar-attempted { background: #2196f3; }\n#quiz-2 .bar-correct { background: #4caf50; }\n#quiz-2 .bar-wrong { background: #f44336; }\n#quiz-2 .bar-unattempted { background: #9e9e9e; width: 100%; }\n\n#quiz-2 .final-score {\n  text-align: center;\n  font-size: 22px;\n  margin-top: 20px;\n}\n\n#quiz-2 .score-value {\n  font-size: 30px;\n  margin-left: 8px;\n}\n<\/style>\n<\/head>\n\n<body>\n<div id=\"quiz-2\">\n  <div class=\"quiz-container\">\n<div id=\"quiz-2-sticky-header\">\n  <span> SSC CGL Number System Questions <\/span>\n  <span id=\"quiz-2-score-badge\">Score: <strong id=\"quiz-2-score-value\">0.00<\/strong><\/span>\n<\/div>\n\n    <!-- QUESTIONS -->\n\nhtml<div class=\"question\" data-answered=\"false\">\n  <p>1. If the difference between a number and its square is 132, find the number.<\/p>\n  <button data-correct=\"true\">A) 12<\/button>\n  <button data-correct=\"false\">B) 11<\/button>\n  <button data-correct=\"false\">C) 10<\/button>\n  <button data-correct=\"false\">D) 9<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>2. The sum of digits of a number is 18 and the number is divisible by 9. Which of the following could be the number?<\/p>\n  <button data-correct=\"false\">A) 126<\/button>\n  <button data-correct=\"false\">B) 261<\/button>\n  <button data-correct=\"true\">C) 153<\/button>\n  <button data-correct=\"false\">D) 234<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>3. What is the remainder when 4\u2077 is divided by 5?<\/p>\n  <button data-correct=\"true\">A) 1<\/button>\n  <button data-correct=\"false\">B) 2<\/button>\n  <button data-correct=\"false\">C) 3<\/button>\n  <button data-correct=\"false\">D) 4<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>4. A number has 3 digits. If the sum of its digits is 12 and it is divisible by 6, which of the following could be that number?<\/p>\n  <button data-correct=\"true\">A) 258<\/button>\n  <button data-correct=\"false\">B) 462<\/button>\n  <button data-correct=\"false\">C) 624<\/button>\n  <button data-correct=\"false\">D) 345<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>5. What is the HCF of 96 and 404?<\/p>\n  <button data-correct=\"false\">A) 4<\/button>\n  <button data-correct=\"true\">B) 8<\/button>\n  <button data-correct=\"false\">C) 12<\/button>\n  <button data-correct=\"false\">D) 2<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>6. What is the LCM of 18, 24, and 36?<\/p>\n  <button data-correct=\"false\">A) 144<\/button>\n  <button data-correct=\"false\">B) 72<\/button>\n  <button data-correct=\"false\">C) 216<\/button>\n  <button data-correct=\"true\">D) 108<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>7. The product of two numbers is 1200. If their HCF is 10, what is their LCM?<\/p>\n  <button data-correct=\"false\">A) 100<\/button>\n  <button data-correct=\"true\">B) 120<\/button>\n  <button data-correct=\"false\">C) 130<\/button>\n  <button data-correct=\"false\">D) 140<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>8. Which of the following is a co-prime pair?<\/p>\n  <button data-correct=\"false\">A) 18 and 24<\/button>\n  <button data-correct=\"true\">B) 12 and 35<\/button>\n  <button data-correct=\"false\">C) 14 and 21<\/button>\n  <button data-correct=\"false\">D) 15 and 30<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>9. Find the smallest number which when divided by 5, 6 and 7 leaves a remainder 3 in each case.<\/p>\n  <button data-correct=\"true\">A) 213<\/button>\n  <button data-correct=\"false\">B) 219<\/button>\n  <button data-correct=\"false\">C) 223<\/button>\n  <button data-correct=\"false\">D) 229<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>10. The sum of two consecutive odd numbers is 56. What are the numbers?<\/p>\n  <button data-correct=\"false\">A) 27 and 29<\/button>\n  <button data-correct=\"false\">B) 25 and 31<\/button>\n  <button data-correct=\"true\">C) 29 and 31<\/button>\n  <button data-correct=\"false\">D) 27 and 31<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>11. If a number is divisible by both 2 and 3, then it must be divisible by:<\/p>\n  <button data-correct=\"false\">A) 5<\/button>\n  <button data-correct=\"true\">B) 6<\/button>\n  <button data-correct=\"false\">C) 8<\/button>\n  <button data-correct=\"false\">D) 9<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>12. A number is divisible by 9 and ends in 2. Which of the following can be the number?<\/p>\n  <button data-correct=\"false\">A) 162<\/button>\n  <button data-correct=\"false\">B) 252<\/button>\n  <button data-correct=\"false\">C) 342<\/button>\n  <button data-correct=\"true\">D) None of these<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>13. What will be the sum of digits of the smallest 3-digit number divisible by 19?<\/p>\n  <button data-correct=\"false\">A) 9<\/button>\n  <button data-correct=\"true\">B) 6<\/button>\n  <button data-correct=\"false\">C) 4<\/button>\n  <button data-correct=\"false\">D) 7<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>14. What is the total number of factors of 120?<\/p>\n  <button data-correct=\"false\">A) 14<\/button>\n  <button data-correct=\"false\">B) 15<\/button>\n  <button data-correct=\"true\">C) 16<\/button>\n  <button data-correct=\"false\">D) 12<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>15. Find the least number which when divided by 4, 6, and 9 leaves remainder 1 in each case.<\/p>\n  <button data-correct=\"false\">A) 73<\/button>\n  <button data-correct=\"false\">B) 109<\/button>\n  <button data-correct=\"false\">C) 145<\/button>\n  <button data-correct=\"true\">D) 181<\/button>\n<\/div>\n\n    <!-- FINAL SUMMARY -->\n    <div class=\"final-summary\">\n      <h3>Quiz Summary <\/h3>\n\n      <div class=\"summary-row\">\n        <span>Attempted<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-attempted\" data-summary=\"attempted\"><\/div><\/div>\n        <span data-count=\"attempted\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Correct<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-correct\" data-summary=\"correct\"><\/div><\/div>\n        <span data-count=\"correct\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Wrong<\/span>\n        <div 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It covers basic types of numbers, their properties, and how to solve related questions quickly and accurately. This topic is asked regularly in both Tier 1 and Tier 2 exams.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-key-concepts-to-know\">Key Concepts to Know<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Types of Numbers: Natural, whole, integers, prime, composite, rational, irrational, and co-prime.<\/li>\n\n\n\n<li>Place Value and Face Value: Understand how digits are positioned in a number.<\/li>\n\n\n\n<li>Divisibility Rules: Especially for 2, 3, 5, 7, 9, 11, and 13.<\/li>\n\n\n\n<li>HCF and LCM: Frequently used in word problems.<\/li>\n\n\n\n<li>Remainders and Modulus: Includes remainder-based questions and divisibility logic.<\/li>\n\n\n\n<li>Base Conversions: Binary, decimal, octal \u2014 mainly asked in Tier 2.<\/li>\n\n\n\n<li>Unit and Last Digit: Common in product or power-based questions.<\/li>\n\n\n\n<li>Factors and Multiples: Total number of factors, sum, and patterns.<\/li>\n\n\n\n<li>Even and Odd Numbers: Often part of logic-based questions.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-types-of-questions-asked\">Types of Questions Asked<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Find the HCF or LCM of two or more numbers<\/li>\n\n\n\n<li>Remainder when a number is divided by another<\/li>\n\n\n\n<li>Unit digit of a product or power<\/li>\n\n\n\n<li>Convert between number systems<\/li>\n\n\n\n<li>Identify prime, composite, or co-prime numbers<\/li>\n\n\n\n<li>Smallest or largest number satisfying given condition<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-number-system-questions-for-ssc-cgl-concept-amp-examples\"><span class=\"ez-toc-section\" id=\"Number_System_Questions_for_SSC_CGL_Concept_Examples\"><\/span>Number System Questions for SSC CGL: Concept &amp; Examples<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The number system is one of the most frequently tested topics in the SSC CGL Quantitative Aptitude section. Questions typically assess your understanding of number types, divisibility, factorization, HCF and LCM, remainders, and patterns in digits.<\/p>\n\n\n\n<p>Below are some key subtopics with solved examples that follow the format Google AI uses to display in AI Overviews and Featured Snippets:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-classification-of-numbers\">1. Classification of Numbers<\/h3>\n\n\n\n<p>This includes identifying different types of numbers: natural, whole, integers, rational, irrational, real, prime, composite, and co-prime numbers.<\/p>\n\n\n\n<p><strong>Example:<\/strong><br><strong>Which of the following is an irrational number?<\/strong><br>a) \u221a16\u2003b) \u221a12\u2003c) \u221a9\u2003d) \u221a25<\/p>\n\n\n\n<p><strong>Solution:<\/strong><br>\u221a16 = 4 (rational)<br>\u221a12 = 2\u221a3 (irrational)<br>\u221a9 = 3 (rational)<br>\u221a25 = 5 (rational)<br><strong>Correct Answer: b) \u221a12<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-divisibility-rules\">2. Divisibility Rules<\/h3>\n\n\n\n<p>These questions test whether a number is divisible by another number without performing full division.<\/p>\n\n\n\n<p><strong>Example:<\/strong><br><strong>What is the value of K such that 72K460K is divisible by 6?<\/strong><br>a) 4\u2003b) 9\u2003c) 7\u2003d) 8<\/p>\n\n\n\n<p><strong>Solution:<\/strong><br>Divisible by 2: Last digit (K) must be even.<br>Divisible by 3: Sum of digits = 7 + 2 + K + 4 + 6 + 0 + K = 19 + 2K<br>Try K = 4 \u2192 sum = 19 + 8 = 27 (divisible by 3), and 4 is even<br><strong>Correct Answer: a) 4<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-lcm-and-hcf-problems\">3. LCM and HCF Problems<\/h3>\n\n\n\n<p>These involve direct calculation or real-life word problems using the relationship:<br><strong>HCF \u00d7 LCM = Product of the numbers<\/strong><\/p>\n\n\n\n<p><strong>Example:<\/strong><br><strong>If HCF of two numbers is 11 and LCM is 693, and one number is 77, what is the other?<\/strong><\/p>\n\n\n\n<p><strong>Solution:<\/strong><br>Other number = (HCF \u00d7 LCM) \u00f7 Given number = (11 \u00d7 693) \u00f7 77 = <strong>99<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-remainders-and-modular-arithmetic\">4. Remainders and Modular Arithmetic<\/h3>\n\n\n\n<p>These test your ability to work with remainders after division, often requiring logical deduction.<\/p>\n\n\n\n<p><strong>Example:<\/strong><br><strong>What is the remainder when 6799 is divided by 7?<\/strong><\/p>\n\n\n\n<p><strong>Solution:<\/strong><br>6799 \u00f7 7 gives a remainder of <strong>2<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-unit-digit-amp-cyclicity\">5. Unit Digit &amp; Cyclicity<\/h3>\n\n\n\n<p>These involve finding the unit digit of large powers using digit cycles.<\/p>\n\n\n\n<p><strong>Example:<\/strong><br><strong>What is the unit digit of (2467)^153 + (342)^82?<\/strong><\/p>\n\n\n\n<p><strong>Solution:<\/strong><br>Last digit of 2467 = 7 \u2192 cyclicity = [7, 9, 3, 1] \u2192 153 mod 4 = 1 \u2192 unit digit = 7<br>Last digit of 342 = 2 \u2192 cyclicity = [2, 4, 8, 6] \u2192 82 mod 4 = 2 \u2192 unit digit = 4<br>Sum = 7 + 4 = <strong>11 \u2192 Unit digit = 1<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-tips-to-prepare-for-number-system-in-ssc-cgl\"><span class=\"ez-toc-section\" id=\"Tips_to_Prepare_for_Number_System_in_SSC_CGL\"><\/span>Tips to Prepare for Number System in SSC CGL<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Focus on concept clarity before memorizing shortcuts<\/li>\n\n\n\n<li>Revise all divisibility rules from 2 to 13<\/li>\n\n\n\n<li>Practice questions involving LCM, HCF, and remainders with different variations<\/li>\n\n\n\n<li>Create a cheat sheet of cyclic patterns for quick reference<\/li>\n\n\n\n<li>Solve previous year SSC papers and timed mock tests regularly<\/li>\n\n\n\n<li>Don\u2019t skip binary and base system conversions (important in Tier 2)<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/ssc-cgl-mock-test\/?ref=contmk-blog-nsq\" target=\"_blank\" rel=\"noreferrer noopener\">Attempt Free SSC CGL Mock Tests 2026<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-common-mistakes-made-by-students-in-ssc-cgl-number-system-questions\"><span class=\"ez-toc-section\" id=\"Common_Mistakes_Made_by_Students_in_SSC_CGL_Number_System_Questions\"><\/span>Common Mistakes Made by Students in SSC CGL Number System Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Every year, many <a href=\"https:\/\/www.oliveboard.in\/ssc-cgl\/?ref=contmk-blog-nsq\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL<\/a> aspirants lose marks in the Number System section due to small but frequent errors. Below is a simple list of common mistakes that students should avoid while preparing and attempting these questions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ignoring basic definitions and properties like types of numbers (natural, whole, integers, prime, co-prime) or place value concepts.<\/li>\n\n\n\n<li>Confusing HCF and LCM in word problems or using incorrect steps in their calculation.<\/li>\n\n\n\n<li>Using divisibility rules incorrectly or forgetting them completely, especially for numbers like 7, 11, and 13.<\/li>\n\n\n\n<li>Applying formulas blindly without checking if the given condition or number type fits (e.g. applying even number logic to odd numbers).<\/li>\n\n\n\n<li>Overcomplicating simple questions instead of identifying patterns or logic-based shortcuts.<\/li>\n\n\n\n<li>Misreading what is being asked especially in questions about remainders, units digit, or greatest\/smallest number satisfying certain conditions.<\/li>\n\n\n\n<li>Not practicing questions on base conversions like binary, octal, or decimal often ignored but asked in exams.<\/li>\n\n\n\n<li>Making calculation errors in basic multiplication, subtraction, or division especially under time pressure.<\/li>\n\n\n\n<li>Avoiding word-based number system questions that require both mathematical understanding and logical thinking.<\/li>\n\n\n\n<li>Skipping revision of core topics in favor of Arithmetic or Algebra, leading to weak performance in Number System.<\/li>\n<\/ul>\n\n\n\n<p>Also check <a href=\"https:\/\/www.oliveboard.in\/ssc-cgl-maths-syllabus\/?ref=contan-ssc\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Maths Syllabus<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-ssc-cgl-number-system-faqs\"><span class=\"ez-toc-section\" id=\"SSC_CGL_Number_System_%E2%80%93_FAQs\"><\/span>SSC CGL Number System \u2013 FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1751901289728\"><strong class=\"schema-faq-question\">Q1. What topics are included under number system?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Types of numbers, HCF, LCM, divisibility, remainders, unit digits, base conversions, etc.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1751901553266\"><strong class=\"schema-faq-question\">Q2. Do SSC questions often ask about divisibility rules?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Yes, especially for 3, 7, 9, 11, and 13.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1751901571937\"><strong class=\"schema-faq-question\">Q3. How to avoid calculation errors in number system questions?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Practice mental math, use shortcuts, and verify steps quickly.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1751901578769\"><strong class=\"schema-faq-question\">Q4. Should I memorize all divisibility rules for SSC?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Yes, especially rules up to 20.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1751901592513\"><strong class=\"schema-faq-question\">Q5. What type of number system questions come in Tier 2?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Application-based and high-speed calculation questions.<\/p> <\/div> <\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/jaiib-exam-analysis-2026\/\">JAIIB Exam Analysis 2026, May Cycle, All Shifts Covered<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/nicl-assistant-score-card\/\">NICL Assistant Mains Score Card 2025-26 Out, Download Now<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/caiib-hrm-module-d-practice-quiz\/\">Attempt CAIIB HRM Module D Practice Quiz and Download PDF<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/jaiib-ie-and-ifs-module-wise-study-guide\/\">JAIIB IE &amp; IFS Module-Wise Mind Maps, Download Free PDF<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/government-banks-in-india\/\">Public Sector Banks in India, FREE PDF &amp; Live Quiz<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/caiib-hrm-module-c-practice-quiz\/\">Attempt CAIIB HRM Module C Practice Quiz and Download PDF<\/a><\/li>\n<\/ul>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>Number System is a fundamental topic in SSC CGL Quant, and questions are usually concept-based but easy to solve with<\/p>\n","protected":false},"author":66,"featured_media":240427,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5217,63],"tags":[],"class_list":["post-94044","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ssc-prep","category-ssc-exams","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Number System Questions for SSC CGL, Solved With Answers<\/title>\n<meta name=\"description\" content=\"Master SSC CGL Number System with 30 solved questions, key concepts, FAQs, and expert tips. 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I focus on creating blogs, articles, and educational content that\u2019s simple, clear, and saves time for readers. I believe in writing that adds real value without overcomplicating things. I also have strong knowledge of banking and government exams, which helps me create content that is both accurate and easy to understand. With experience and consistency, I aim to make preparation smoother for every learner.\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901289728\",\"position\":1,\"url\":\"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901289728\",\"name\":\"Q1. 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What topics are included under number system?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Types of numbers, HCF, LCM, divisibility, remainders, unit digits, base conversions, etc.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901553266","position":2,"url":"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901553266","name":"Q2. Do SSC questions often ask about divisibility rules?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Yes, especially for 3, 7, 9, 11, and 13.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901571937","position":3,"url":"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901571937","name":"Q3. How to avoid calculation errors in number system questions?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Practice mental math, use shortcuts, and verify steps quickly.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901578769","position":4,"url":"https:\/\/www.oliveboard.in\/blog\/number-system-questions-for-ssc-cgl\/#faq-question-1751901578769","name":"Q4. 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