Advanced Math practice question

Answer: 5

Doubling from 1: 2, 4, 8, 16, 32 — five doublings, so 5 hours.

Common wrong answers

If you answered 6

After 6 hours there are 64 cells; 32 is reached at hour 5.

If you answered 16

16 cells is the count after 4 hours; one more doubling reaches 32.

If you answered 32

32 is the cell count, not the number of hours.

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