Question

calculati suma numerelor care impartite la 8 dau catul 5

Answer 1

n=8x5 +0 = 40 ,cu restul < 8 , adica r∈{0,1,2......7}
n=8x5 +1 = 41
n =8x5+2 =.42
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n= 8x5 +7 =47
deci n∈{40,41,42,43,44,45,46,47}