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Math

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Every day Sally saved a penny, a dime, and a quarter. What is the least number of days required for her to save an amount equivalent to an integral number of dollars?

  • Math -

    .36 dollars a day
    100 days = 36 dollars
    50 days = 18 dollars
    25 days = 9 dollars
    humm, no more common factors

  • Math -

    25. The sum of a penny, a dime, and
    a quarter is 36 cents. The number 36
    factors into 2²•3². To get an integral
    value in dollars, we must multiply by 5² so that the product ends in two zeroes.
    Any multiple of 25 will work, but 25 is
    the least of those values.

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