16Hit1600
Advanced MathEasy–MediumGrowth factor over several hours

Advanced Math practice question

A bacterial culture grows by a factor of 4 every hour. By what factor does the culture grow over 3 hours?

Answer: 64

Three hourly factors of 4 multiply: 4 × 4 × 4 = 64.

Common wrong answers

If you answered 12
12 adds the factors instead of multiplying.
If you answered 16
16 uses only two hours.
If you answered 81
81 uses 3 as the factor and 4 as the number of hours.

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