Question

calculati suma nhmerelor naturale care impartite la 8 dau catul 5​

Answer 1

x:8=5 rest r=>x=8*5+r, unde r<8
Deducem ca r∈{0,1,2,...7}. Numerele sunt:
x=8*5+0
x=8*5+1
x=8*5+2
x=8*5+3
x=8*5+4
x=8*5+5
x=8*5+6
x=8*5+7
Suma numerelor este 40*8+(0+1+2+...+7)=320+28=348.