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    jaren27's Avatar
    jaren27 Posts: 1, Reputation: 1
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    #1

    Nov 14, 2008, 08:43 PM
    How many distinct prime numbers are factors of 70?
    How many distinct prime numbers are the factors of 70?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Nov 14, 2008, 09:34 PM

    The answer is 4. First, let's see you factor it.
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #3

    Nov 15, 2008, 03:49 AM
    Just break down 70 to it's smallest numbers (as in : a x b x c = 70) where none of the numbers can be divided by another number than 1 or itself.

    Than count these smallest numbers (factors).

    Example : 34 = 2 x 17 --> 1 x 2 x 17 = 34 --> 3 factors

    Success !

    :)
    sfdsfdsf's Avatar
    sfdsfdsf Posts: 1, Reputation: 1
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    #4

    Nov 4, 2009, 06:59 PM
    35634656
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #5

    Nov 5, 2009, 10:39 AM
    Quote Originally Posted by jaren27 View Post
    how many distinct prime numbers are the factors of 70?
    Start by figuring out he prime numbers up to the square root of 70 (9x9=81, 8x8=64 so you don't need to go above 8.) Don't include 1 as a prime number.

    Divide by the smallest, if you can. Divide the remainder by the smallest if you can; if not, try the next highest prime factor.
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