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26 February, 23:25

Billy is thinking of three numbers from 1 through 9 with a sum of 17. each number is used only once. What are the numbers?

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  1. 26 February, 23:49
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    This is very interesting.

    Billy could be thinking of

    1, 7, and 9

    2, 6, and 9

    2, 7, and 8

    3, 5, and 9

    3, 6, and 8

    4, 5, and 8

    or

    4, 6, and 7

    but no other set of three numbers.
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