WAEC Mathematics 2023 Objective — Question 7

Question 7 of 50 from the West African Examinations Council (WAEC) Mathematics 2023 Objective paper, with the correct answer and a full explanation.

Mr. Manu is 4 times as old as his son, Adu. 7 years ago, the sum of their ages was 76 years. How old is Adu?

Explanation

Let Mamu's age=x=4y (y=Adu's age). 7 years ago: (x-7)+(y-7)=76 → x+y=90. Substituting x=4y: 5y=90 → y=18. Adu is 18 years old.

…and/or go further with premium services and No Ads.