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Math Help - math game

  1. #1
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    HELP!!! This bonus could help me pass

    Four numbers
    (1) (5) (6) (7)

    The object is to define an equation that will yield 21.

    Can do:
    1. Utilize all forms of basic math operations (i.e. *, + , - , /). All other operations not allowed.
    2. Can only use each number once

    Cannot do:
    1. Use decimals.

    Help!!!
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  2. #2
    Site Founder MathGuru's Avatar
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    6/(1-(5/7))
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  3. #3
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    Thanks!!

    Thanks!!!

    Would this work when it comes to the fact that you can not use any decimals, or would there be another trick to this...
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  4. #4
    Site Founder MathGuru's Avatar
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    Yes this works given the no decimals rule.

    that rule refers to doing something like this 6.1/5.7

    This solution satisfies all of the rules.
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