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21 October, 17:19

suma a 3 numere este 100000. cat este al doilea numar, daca primul este 9999, iar al treileaeste dublul primului?

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  1. 21 October, 19:16
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    Hypotheticly a is the first number, b the second and c the last one.

    a=9999, c=2a

    a+b+c=100 000

    if a+1=10 000 (no letter) then c = 2 * (a+1-1) = 2 * (a+1) - 2 so

    a+1+b+2 * (a+1) - 2=100 000

    b=72 000

    the second number is as good as 72 000
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