Question

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

Answer 1

x:7=r rest r<=> x=7r+r, unde r<7
r<7=>r=0,1,...6
Daca x=0=>x=7*0+0=0
Daca x=1=>x=7*1+1=8
Daca x=2=>x=7*2+2=16
Daca x=3=>x=7*3+3=24
Daca x=4=>x=7*4+4=32
Daca x=5=>x=7*5+5=40
Daca x=6=>x=7*6+6=48

Answer 2

8:7=1 ,1
16:7=2 , 2
24:7=3 , 3
32:7=4 , 4
40:7=5 , 5
48:7=6 , 6