Multiple choice

A's present age is twice that of B. If B's age 5 years ago was b, then what is A's present age?

  1. 2b + 5

  2. 2b - 5

  3. 2b - 10

  4. 2b + 10
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A = 2B. B's age 5 years ago was b, so B_past = B - 5 = b. Thus B = b + 5. A's present age = 2B = 2(b + 5) = 2b + 10.

AI explanation

If B's age 5 years ago was b, then B's present age is b + 5. Since A's present age is twice B's present age, you must multiply this expression by 2. Multiplying b + 5 by 2 results in 2b + 10, which is A's present age.

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