find all sets of two consecutive positive odd integers whose sum is no greater than 18

Discussion in 'Calculator Requests' started by math_celebrity, Oct 14, 2016.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    So x + y <=18
    y = x + 1

    x + x + 1 <=18
    2x + 1 <= 18

    Subtract 1 from both sides
    2x <= 17
    x<=8.5 --> 8
    So we have {(0,1),(1,2),(2,3),(3,4),(4,5),(5,6),(6,7),(7,8),(8,9)}

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