math

posted by teresa

a music store gives every 20th customer a $5 gift card. Every 50th customer gets a $10 gift card. which customer will be the first to receive both types of gift cards?

  1. Ms. Sue

    20, 40, 60, 80, 100, 120, 140

    50, 100, 150, 200

  2. Ada

    20=2*2*5
    50=2*5*5
    the first customer to receive both = 2*2*5*5=100 - that would be the smallest common multiple

  3. steve

    100

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