P has only one child.
O is the mother-in-law of P, who is the sister-in-law of R.
P has no siblings.
R is a female person and married.
P is the sister-in-law of R.
R's sister-in-law's age is 27 years.
Q is the father-in-law of S.
Q has two children.
S is married to R.
O is the 2nd oldest person in this family and his son's age is 30 years.
O's husband is the oldest person in the family.
Age of U is 30 years.
Thus, U must be the son of O.
| Year | Person |
| 65 | Q |
| 62 | O |
| 58 | |
| 56 | |
| 30 | U |
| 27 | P |
| 25 | |
| 24 | |
| 13 | |
R is paternal aunt of T.
R is the 2nd youngest person in this family.
| Year | Person |
| 65 | Q |
| 62 | O |
| 58 | |
| 56 | |
| 30 | U |
| 27 | P |
| 25 | |
| 24 | R |
| 13 | |
M, who is married to N, is the grandmother of T.
U's father-in-law is the 3rd oldest person in the family.
Thus, the age of N must be 58 years and the age of M must be 56 years.
| Year | Person |
| 65 | Q |
| 62 | O |
| 58 | N |
| 56 | M |
| 30 | U |
| 27 | P |
| 25 | |
| 24 | R |
| 13 | |
There are 5 male members.
Also, T is from 3rd generation.
Thus, the gender of T is male and T is the youngest member.
| Year | Person |
| 65 | Q |
| 62 | O |
| 58 | N |
| 56 | M |
| 30 | U |
| 27 | P |
| 25 | S |
| 24 | R |
| 13 | T |
This is the final arrangement.
Age of M = 56
Age of S = 25
Difference = 56 - 25 = 31
Study Notes
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