ab : 6 = c rest 1
ab = 6 × c + 1
ab = M6 + 1
M6 < 99
M6 = 12; 18; 24; 30; 36; 42; 48; 54; 60; 66; 72; 78; 84; 90; 96
asadar,
ab = 13; 19; 25; 31; 37; 42; 49; 55; 61; 67; 73; 79; 85; 91; 97 .
S = 13 + 19 + 25 + ...+ 97
S = [(97 - 13 ): 6 + 1 ] × (13 + 97) : 2
S = (84 : 6 + 1) × 110 : 2
S = 15 × 55
S = 825 (suma)
__________
