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Math Help - Money...

  1. #1
    Senior Member
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    Money...

    Sorry if this is too easy....

    A, B, and C, have $10 each. They call D to buy snacks for them. The snacks cost them $25. A, B, and C each keeps 1$ of the change and give $2 to D.

    Re-sum the money : A, B, and C spent $9 each and D got $2, so total money = 3 x $9 + $2 = $29

    Well, the sum supposes to be $30, doesn't it? Where is the missing $1 ?
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  2. #2
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    Hi songoku

    Quote Originally Posted by songoku View Post
    A, B, and C, have $10 each. They call D to buy snacks for them. The snacks cost them $25. A, B, and C each keeps 1$ of the change and give $2 to D.

    Re-sum the money : A, B, and C spent $9 each and D got $2, so total money = 3 x $9 + $2 = $29

    Well, the sum supposes to be $30, doesn't it? Where is the missing $1 ?
    That does not make any sense.

    A, B, and C have $10 each. A, B and C give $9 each to D. So D gets $9x3 = $27
    D buys some snacks and pays $25 -> $27-$25 = $2 change.
    So the $2 were included in in the $27. That's why $27 + $2 = $29 does not make any sense.

    You know what I'm saying?

    Yours
    Rapha
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  3. #3
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    Hi Rapha

    That's correct
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  4. #4
    MHF Contributor
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    That puzzle has been around for years....

    missing dollar puzzle - Google Search=
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