Lucy is thinking of a number. The number is greater than two hundred twenty-five. Her number is less

Discussion in 'Calculator Requests' started by math_celebrity, Apr 20, 2023.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    Lucy is thinking of a number. The number is greater than two hundred twenty-five. Her number is less than 2 hundreds, 2 tens, and 7 ones. What is Lucy's number?

    Let the number be n.
    n > 225

    Also:
    n < 2(100) + 2(10) + 7(1)
    n < 200 + 20 + 7
    n < 227

    Combine these, we get:
    225 < n < 227

    Only one number satisfies this:
    n = 226

     
    Last edited: Jan 13, 2024

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