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MATH

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24 1c coins are set out in a row on a table. Then
every 2nd coin is replaced by a 2c coin
every 3rd coin is replaced by a 5c coin
every 4th coin is replaced by a 10c coin
every 5th coin is replaced by a 20c coin
every 6th coin is replaced by a 50c coin
every 7th coin is replaced by a $1 coin
After all the exchanges have been carried out, what is the total amount left on the table?

Please help, the answer suppose to be $6.30 but I got $7.04?

Thank you

  • MATH -

    In the end, you have the following values:
    coin value
    7 $1
    14 $1
    21 $1
    6 .50
    12 .50
    18 .50
    24 .50
    5 .20
    10 .20
    15 .20
    20 .20
    4 .1
    8 .1
    16 .1
    2 .05
    22 .05
    the remaining all are .01
    I count 16 above out of 24 coins, or .01*8
    check my thinking.

  • MATH -

    you are wrong it is 6.30 that's what i got

  • MATH -

    Hi Mariela, could you please tell me how you got $6.30. Explanation above still added over $6.30, I'm confused.

    Thanks

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