A father is seven times as old as his son. If the sum of their ages in 15 years time is 62, how old will the father be when the son reaches the age of 15?

43

Step-by-step explanation:

father = 7u

son = 1u

current age sum = 62 - 15 - 15 (deduct 15 years from both ages)

= 32

8u = 32

1u = 4

∴ son is currently 4 and father is 32

15 - 4 = 11 (takes 11 more years for son to turn 11)

father when son is 15 = 32 + 11

= 43