Răspunsuri

2014-10-03T14:47:33+03:00
2014-10-03T15:21:58+03:00
:2+3+4+.....+50=1+:2+3+4+.....+50-1=50*51:2-1=1275-1=1274

Ai grija, situl nu incepe de la 1

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