Răspuns:
n : 7=cat=rest
R< 7
cat = rest = 0,1,2,3,4,5,6
n : 7 =0 rest 0=>n = 0
n : 7 =1 rest 1=>n = 1·7+1 =8
n : 7 =2 rest 2=>n = 14+2 =16
n : 7 =3 rest 3=>n = 21+3 =24
n : 7 =4 rest 4=>n = 28+4 =32
n : 7 =5 rest 5=>n = 35+ 5 =40
n : 7 =6 rest 6=>n = 42+6 =48
nr cautate - 0; 8; 16; 24; 32; 40;48
