Among seven people F, G, H, K, L, M and N, each has a different age. Only H is older than K. The second oldest is 38 years old. Only three people are younger than L. M is older than only N. M’s age is half of K’s age. F is 36 years old. L’s age is a multiple of10. What can be the sum of the ages of K and L?

K = 38 (2nd oldest), H is oldest

F = 36 (3rd oldest)

M = 19 (only older than N)

L is 4th in age, age is a multiple of 10 → possible: 30

So, K + L = 38 + 30 = 68