Math

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Lyle wanted change for a $100 bill. He wanted at least three $20 bills, one $10 bill, one $5 bill and seven $1 bills. What is the least number of bills Lyle could have received?

A. 18
B. 16
C. 17
D. 15

I don't get how to get the answer

  • Math -

    How do you get the answer?

  • Math -

    (3 * 20) + 10 + 5 + 7 = $82 >> 12 bills

    100 - 82 = 18

    10 + 5 + 3 = 18

    12 + 3 = 15

  • Math -

    So it's D?

  • Math -

    let's go with the minimums and see what we get
    3 20's + 1 10 + 1 5 + 7 1's = $82 ---> 12 bills
    so we are short $18
    using the least number of bills, I can fill that with
    $10 + $5 + 3($1) --> 5 bills

    total bills = 17

  • Math -

    Sorry but I'm confused. Because they said its D but you said its C
    I also don't get why the $82 is $12

  • Math - Correction -

    Reiny is right. I can't add. Of course, 12 + 5 = 17.

  • Math -

    We need 12 bills to fulfill the minimum requirement.
    That totals $82 (check both Ms Sue's and mine)

    leaving us $18 short

    the minimum way to get $18 is
    one ten
    one five
    3 ones , for a total of 5 more bills

    total = 17

    BTW, nowhere was it said that $82 is $12.

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