How many 2- digit numbers have exactly 3 factors?

asked Jan 14, 2018 225k views

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5 votes

Answer:

25 and 49 are the only two-digit numbers which have exactly three factors.

Explanation:

Matt DiTrolio answered Jan 17, 2018

5.7k points

4 votes

11,13,17,19,23,29,31

Wienczny answered Jan 20, 2018

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