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Math Help - Fundamental Math

  1. #1
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    Fundamental Math

    How did he get his answer 0.51???
    Attached Thumbnails Attached Thumbnails Fundamental Math-screen-shot-2012-11-30-11.42.49-am.png  
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  2. #2
    MHF Contributor MarkFL's Avatar
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    Re: Fundamental Math

    It is a typo, the choice should be 0.26.
    Thanks from asilvester635
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    Re: Fundamental Math

    another question, why is 15 a prime number? isn't it divisible by 3? and the definition for prime number is "Divisible by ONLY itself AND 1"
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    MHF Contributor MarkFL's Avatar
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    Re: Fundamental Math

    15 isn't prime, as it is divisible by 3 and 5.
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    Re: Fundamental Math

    lol i guess another typo... thanks
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    Re: Fundamental Math

    Quote Originally Posted by asilvester635 View Post
    the definition for prime number is "Divisible by ONLY itself AND 1"
    If that were the definition of prime number, would that not mean that 1 is a prime number?
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  7. #7
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    Re: Fundamental Math

    Can anyone explain this better to me???? I don't exactly grasp this concept...

    Topic: Multiple
    Definition: Number multiplied by an integer
    Example: The first multiple of 6 is 6, then 12
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  8. #8
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    Re: Fundamental Math

    "A is a multiple of B", where A and B are integers, means that there exist some integer C such that A= BC.

    6 is a multiple of 6 because it is equal to 1(6). That is, C= 1. 12 is multiple of 6 because 12= (6)(2). It is the "1" and "2" that causes them to say "first" multiple and "then". The next few multiples are 3(6)= 18, 4(6)= 24, 5(6)= 30, etc.
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    Re: Fundamental Math

    so can we say that 12 is a multiple of 2??
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    Re: Fundamental Math

    and can we also way that 12 is a multiple of 12 because it is equal to 1(12). That is, c= 1?
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    Re: Fundamental Math

    never mind i get it lol thanks
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