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A store gave away a $5 gift card to every sixth customer and a $10 gift card to every tenth customer.Which customer would be the first one to receive both a $5 and a $10 gift card?please help

  • math -

    Multiples of 10:

    10, 20, 30, 40

    Multiples of 6:

    6, 12, 18, 24, 30, 36, 42

  • math -

    30

  • math -

    Customer number 1

  • math -

    Customer number 2

  • math -

    how do you do this problem

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