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| Math Central | Quandaries & Queries |
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Question from kerwin: one penny doubled for 30 days what is the answer? |
Hi Kerwin,
| Day | Number of pennies | Value |
|---|---|---|
| 1 | 1 | 1¢ |
| 2 | 2 × 1 = 2 | 2¢ |
| 3 | 2 × 2 = 22 | 4¢ |
| 4 | 2 × 22 = 23 | 8¢ |
| 5 | 2 × 23 = 24 | 16¢ |
| . . . |
. . . |
. . . |
| 30 | ?? | ?? |
Penny
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