AlgebraEasyHeight of a burning candle
Algebra practice question
A candle is 20 centimetres tall and burns down by 2 centimetres every hour. How tall, in centimetres, is the candle after 4 hours?
Answer: 12
20 − 2 × 4 = 12.
Common wrong answers
- If you answered 8
- 8 is the amount burned, not the height left.
- If you answered 16
- 16 subtracts 4 instead of 8.
- If you answered 18
- 18 subtracts 2 only once.
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