SOLUTION: How many positive integers are less than 100 and have an odd number of factors?
Algebra.Com
Question 913221: How many positive integers are less than 100 and have an odd number of factors?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Only positive integers with an odd number of factors are perfect squares.
1, 4, 9, 16, ..., 81 (=9^2)
Answer = 9
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