Multiple choice

The ratio of A's age 3 years ago and B's age 5 years ago is 4: 5. If A is 4 years younger than B what is the present age of B?

  1. 16

  2. 14

  3. 11

  4. 15
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let B's present age be x. Then A's present age is x-4. Three years ago: A=x-7, B=x-5. Ratio (x-7)/(x-5)=4/5. Solving: 5(x-7)=4(x-5) → 5x-35=4x-20 → x=15. So B is 15 years old. Option D is correct.

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