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2014-02-08T12:47:02+02:00
5k + 5(k+1) + 5(k+2) + 5(k+3) + 5(k+4) + 5(k+5) = 165    /:5
k + k+1 + k+2 + k+3 + k+4 + k+5 = 33
6k + 15 = 33
6k = 18 => k = 3
Numerele sunt : 15, 20, 25, 30, 35 si 40.
2014-02-08T12:47:55+02:00