n = 32·25 + r = 800+r r < 32 r ∈ {0,1,2,3.......31}
cel mai mic nr. r =0 n = 800
cel mai mare nr. r = 31 n = 831
2. n = 6·75 + r = 450+r r <6 r∈{0,1,2,3,4,5} ⇒ n∈{450,451,......455}
3 n = 6·c + r c = 3r r ∈ {1,2,3,4,5} ⇒ c ∈ { 3,6,9.12,15}
n = 18r + r = 19r ⇒ n ∈{19,38,57,76,95}