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January 22nd, 2019, 11:12 AM  #1 
Newbie Joined: Jan 2019 From: Arrakis Posts: 7 Thanks: 0  Brainteaser #1
Instructions: Find which numbers less than 100 have exactly 3 factors, including themselves and one? Diak42 
January 22nd, 2019, 12:54 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,644 Thanks: 2084 
4, 9, 25, 49


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