Advanced MathEasy–MediumThree doublings from 50
Advanced Math practice question
A number of bacteria doubles every hour. If there are 50 now, how many will there be in 3 hours?
Answer: 400
50 → 100 → 200 → 400.
Common wrong answers
- If you answered 150
- 150 adds 50 three times.
- If you answered 200
- 200 is after 2 hours.
- If you answered 300
- 300 multiplies 50 by 6.
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