Eight persons- S, T, U, V, W, X, Y and Z were born in different months viz., January, February, March, April, May, July, August and October but not necessarily in the same order. Only one person is born in each month.
T was born in the month having less than 31 days.
Two persons were born between T and Y.
| | Case 1 | Case 2 | Case 3 |
| Month | Person | Person | Person |
| January | | Y | |
| February | T | | |
| March | | | |
| April | | T | T |
| May | Y | | |
| July | | | |
| August | | | Y |
| October | | | |
Four persons were born between Y and W.
Thus, Case 1 gets cancelled.
| | Case 2 | Case 3 |
| Month | Person | Person |
| January | Y | |
| February | | W |
| March | | |
| April | T | T |
| May | | |
| July | W | |
| August | | Y |
| October | | |
X was born immediately before V.
X was not born in the month having 31 days.
Thus, Case 3 gets cancelled.
| | Case 2 |
| Month | Person |
| January | Y |
| February | X |
| March | V |
| April | T |
| May | |
| July | W |
| August | |
| October | |
U was born after S.
At least two person were born between S and U.
| Month | Person |
| January | Y |
| February | X |
| March | V |
| April | T |
| May | S |
| July | W |
| August | |
| October | U |
Now, only Z is remaining.
| Month | Person |
| January | Y |
| February | X |
| March | V |
| April | T |
| May | S |
| July | W |
| August | Z |
| October | U |
This is the final arrangement.
Except T, all other persons were born in the month having 31 days.
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