Advanced MathVery hardHalvings needed to reach a level
Advanced Math practice question
A quantity starts at 64 and halves every 5 minutes. After how many minutes will it first be 8?
Answer: 15
64 → 32 → 16 → 8 is three halvings, or 15 minutes.
Common wrong answers
- If you answered 3
- 3 is the number of halvings.
- If you answered 8
- 8 is the target quantity.
- If you answered 40
- 40 is 5 × 8.
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