Question

Afla suma tuturor numerelor numerelor care impartite la 6 dau catul egal cu restul


DAU COROANA!

Answer 1

n:6=c  + r
c=r
r<6 ⇒ r=1 ; 2 ; 3 ; 4 ; 5
n:6=1  rest 1
n=1x6+1 ⇒ n=7
n:6=2  rest 2
n=2x6+2 ⇒ n=14
n:6=3  rest 3
n=3x6+3 ⇒ n=21
n:6=4  rest 4
n=4x6+4 ⇒ n=28
n:6=5  rest 5
n=5x6+5 ⇒ n=35
7+14+21+28+35=