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How many different positive integer values of x will make this statement true: there is exactly one positive, two-digit multiple of x .

 Jul 19, 2020
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There should be: 49 - 34 + 1 =16 positive values of x that have only one 2-digit multiple. Example:

34 x 2 =68 - Next multiple of 34 is 3-digit 102.

35 x 2 = 70 - Next multiple of 35 is 3-digit 105

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49 x 2 =98 - Next multiple of 49 is 3-digit 147

 Jul 19, 2020

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