1) x = 3a + r 2) d = 6i + r d = 6i + 4 d + i = 32 32- i = 6i + 4
x = 10 10 = 3·3 + 1 7i = 28 i = 4 d = 28
x = 11 11 = 3·3 + 2 3) a - b = 5085 a = s·b + 141 s·b + 141 - b = 5085
x = 12 12 = 3·4 + 0 b = 4944 / (s - 1) a = 5085 + b
x = 13 13 = 3·4 + 1 4) b ∈ {0,5} a ∈ { 0,1,2,3,.....9} 2·10 = 20 fractii
x = 14 14 = 3·4 + 2 5) a) x = 2 b) x =7 c) x = 0
................................. 6) p.p. ∈ { 4.16.36.64}
x = 18 18 = 3·6 +0 7) Ф (0 ⇒ din 2·5),numerele date nu au 5 drept factor prim x = 19 19 = 3·6 + 1 8) 71 + 136 =207 ≠ p.p.
x = 20 20 = 3·6 + 2 9) c.p.∈{1,8,27,64}
S = (1+2)·4 = 12 10) 77 ≠ c.p.