AlgebraEasy–MediumHalf of a number, increased by 3
Algebra practice question
Half of a number, increased by 3, is equal to 11. What is the number?
Answer: 16
Let the number be x: x/2 + 3 = 11. Subtract 3: x/2 = 8. Multiply by 2: x = 16.
Common wrong answers
- If you answered 4
- 4 is 8/2, dividing by 2 instead of multiplying to undo the half.
- If you answered 7
- 7 is (11 + 3)/2 — the 3 should be subtracted, not added.
- If you answered 22
- 22 is 11 × 2, forgetting to subtract the 3 first.
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