AlgebraEasy–MediumFewest whole units to exceed a target
Algebra practice question
A tank must be filled with at least 125 litres of water. Water is carried in 8-litre buckets. What is the fewest number of full buckets needed?
Answer: 16
8n ≥ 125 gives n ≥ 15.6, so 16 buckets.
Common wrong answers
- If you answered 15
- 15 buckets carry only 120 litres.
- If you answered 17
- 17 is more than needed; 16 already gives 128 litres.
- If you answered 15.6
- 15.6 is the exact quotient; buckets are whole.
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