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resident2013

  • one year ago

If a, b and c are positive integers and if a=2b and a^2+b^2=c, which of the following cannot equal to c? a) 5 b)20 c) 50 d) 125 e) 500

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  1. DDCamp
    • one year ago
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    |dw:1373735734443:dw| c is 5 times a square number. Divide each of the possible answers by 5 and see which one isn't a square number.

  2. R00nnYBraiNsbiG
    • one year ago
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    man really lol

  3. EffImHighOffSkittles
    • one year ago
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    Jack seriously I am not a smart person xD stahp

  4. R00nnYBraiNsbiG
    • one year ago
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    @.Sam. please save time and help

  5. sumi29
    • one year ago
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    You have a relation between two of the three variables, so use it. You will be eliminating one of them in the process. Finally you get a simple expression, as solved above by a member. Try out all the given options and get to the correct answer.

  6. AnElephant
    • one year ago
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    DDCamp gave a really nice method, why am i being tagged?

  7. SnuggieLad
    • one year ago
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    Please stop tagging me. That was 12 notifications when I logged on JUST from you.

  8. Jack17
    • one year ago
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    im so sorry

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