SOLUTION: How many positive integers less than 150 are there such that all of the digits are odd?

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Question 514616: How many positive integers less than 150 are there such that all of the digits are odd?
Answer by solver91311(24713) About Me  (Show Source):
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There are 5 from 0 to 9, 5 from 10 to 19, none from 20 to 29, 5 from 31 to 39...and so on. 8 groupings of 10 numbers with 5 each. 40.

John

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