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Thread: Number Theory

  1. July 20th 2008, 12:06 PM #1
    JCIR
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    Number Theory

    Let a be an even integer. then a^2 is congruent to 0mod4.
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  2. July 20th 2008, 12:08 PM #2
    Moo
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    Hello,
    Quote Originally Posted by JCIR View Post
    Let a be an even integer. then a^2 is congruent to 0mod4.
    Oh !!! You could've thought a bit for this one !

    a is an even integer ---> a=2k, where k is an integer.

    Therefore, aČ=...
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