Multiple choice

Present age of B is twice that of A. 4 years hence B’s age will be 4 less than twice the age of A. Find the difference in their ages?

  1. 20 years

  2. 24 years

  3. 27 years

  4. 29 years

  5. Cannot be determined
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Let A's present age be a years. Then B's present age is 2a years. After 4 years: B's age = 2a + 4, and twice A's age = 2(a + 4) = 2a + 8. The condition states 2a + 4 = (2a + 8) - 4, which simplifies to 2a + 4 = 2a + 4. This is an identity that holds for all values of a, meaning the information given is insufficient to determine a unique numerical answer for the age difference.

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