A mother is now three times as old as her child and is 42 years old. How old will the child be in 5 years?

A) 20 years

B) 18 years

C) 21 years

D) 19 years

Answer: D

Explanation: Divide the mother’s age by 3 for the child’s age now, then add the years.
Child after 5 years = 42 ÷ 3 + 5 = 19 years.