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math

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you have several coins that total 38 cents. you have the same number of pennies as you do nickles. how many coins do you have?

  • math -

    Since the number of nickels (5 cents) is the same number as pennies (1 cent), their sum goes in multiples of 6 cents.

    Assume there are N of each of pennies and nickels
    N amount left
    1 32
    2 26
    3 20
    4 14
    5 8
    6 2
    Since 20 cents equals two dimes (10 cents), we conclude that there are
    2 dimes
    3 nickels
    3 pennies.

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