16Hit1600
Advanced MathEasyDoubling count as an exponential equation

Advanced Math practice question

A single cell splits into 2 cells every hour, so after h hours there are 2ʰ cells. After how many hours are there 16 cells?

Answer: 4

2 → 4 → 8 → 16 takes four doublings: 2⁴ = 16, so h = 4.

Common wrong answers

If you answered 3
3 hours gives 2³ = 8 cells.
If you answered 8
8 is 16 ÷ 2.
If you answered 16
16 is the number of cells, not the hours.

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