Ahmed is 3 years older than Khaled. In 4 years the sum of their ages will be 37. How old is Khaled now?

Correct answer: 13 years

Let Khaled's age be x. Ahmed's age is x + 3. In 4 years: (x + 4) + (x + 7) = 37. So 2x = 26 and x = 13.

Test structure: ETEC guide to the GAT