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what type of number has an odd number of factors? give examples
Well, it can't be prime because prime numbers always have two factors, 1 and the number itself. The only numbers that have an odd number of factors are perfect squares. 4, 9, 16, 25, etc. For example numbers that multiply to 4 are 1*4 and 2*2, so, the number of factors is odd, 1, 2 & 4. Multiples of 9 are 1*9 and 3*3, factors equal 1,3 and 9. All other numbers will have an even number of factors.
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Answers by Expert:
Lynn Houston
Expertise
I can answer questions in basic algebra and any grade school math.
Experience
Love math, currently helping my nephew get through Intermediate Algebra.
Education/Credentials
I majored in Math Ed in college (but decided not to teach), so have over 40 credits of math.
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