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Solutions
1. The age of H is an even number.
2. Two people are born between H and M.
3. The difference between the ages of M and R is a multiple of 8.

4. Three people are born between R and J.
(Here, case 3 will be eliminated and we will continue with the remaining cases)
5. Q is younger than J and older than Y.
(Here, case 2 will be eliminated and we will continue with the case 1)

6. The difference between the ages of K and F is a multiple of 7.
7. The difference between the ages of Q and K is a prime number.

Hence, the required answer is ’48 years’.