Question

aflati toate numerele naturale care impartite la 7 dau catul egal cu restul

Answer 1

n = numarul natural cautat ...

n : 7 = c  si rest c  => n = 7*c + c = 8c

inseamna ca n = {1*8=8; 2*8=16; 3*8=24; 4*8=32; ... }

Proba: n=8   =>  8:7 =1 (rest 1) (A) ;

            n=16 => 16:7=2 (rest 2) (A) ;

                            s.a.m.d.