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gasiti suma tuturor numerelor care impartite la 4 dau catu7

Răspuns :

n : 4 = 7 + rest

i = 4 => rest = 0, 1, 2, 3

n = 4 x 7 + rest =>

n = 28 + (0, 1, 2, 3)

n = 28, 29, 30, 31

S = 28 + 29 + 30 + 31

S = 118