Question

"there are four members in a family - mother, father, daughter, and son. father is four times as old as son, and three years older than mother. mother is five times as old as daughter. if both parents were older than 21 when they had children, and they are still below 65, what is the difference in the ages of daughter and son."

Answer 1

F = 4S
F = M+ 3
M = 5D
F - M = 3
4S- 5D = 3
4*7 - 5*5 = 3
so daughter's age = 5 and son's age = 7
7-5 = 2