Advanced Math practice question

Answer: 16

4000/250 = 16 = 2⁴, so four doublings, and 4 × 4 = 16 days.

Common wrong answers

If you answered 4

4 is the number of doublings, not days.

If you answered 8

8 days is two doublings, giving 1,000.

If you answered 64

64 multiplies the ratio 16 by 4 days, mistaking the ratio for the number of doublings; 16 = 2⁴ means four doublings.

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