Multiple choice general knowledge math & puzzles

Shawn is 4/5ths as old now as he will be in 7 years. How old is he now?

  1. 24

  2. 25

  3. 28

  4. 30
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let current age be x. Then x = (4/5)(x + 7). Solving: 5x = 4x + 28, so x = 28. Verify: in 7 years he will be 35, and 28 is indeed 4/5 of 35.

AI explanation

Let Shawn's current age be x. In 7 years he'll be x+7. The problem states he is now 4/5 of that future age: x = (4/5)(x+7). Multiply both sides by 5: 5x = 4x + 28, so x = 28. Check: in 7 years he'll be 35, and 4/5 of 35 is 28, which matches his current age. The other options (24, 25, 30) fail this check -- e.g., 4/5 of (24+7)=24.8, not 24.

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