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# Help

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If a/b is the probability that the reciprocal of a randomly selected positive odd integer less than 2010 gives a terminating decimal, with a and b being relatively prime positive integers, what is a+b?

Jul 30, 2019

### 1+0 Answers

#1
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$$\dfrac a b = \dfrac{\text{# of powers of 5 from 1-2010}}{\text{# of odd integers from 1-2010}}\\~\\ \text{I leave you to figure out those numbers}$$

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Jul 30, 2019