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aflați câte numere de forma a1b sunt impare

Răspuns :

a1b=b:1,3,5,7,9
a:1,2,3...9
111,113,115,117,119
211,213,215,217,219
311,313,315,317,319
411,413,415,417,419
511,513,515,517,519
611,613,615,617,619
711,713,715,717,719
811,813,815,817,819
911,913,915,917,919