a : 12 = x rest 6
a = 12x+6
a : 18 = y rest 6
a = 18y + 6
a : 48 = z rest 6
a = 48z + 6
12 = 2^2 × 3
18 = 2 × 3^2
48 = 2^4 ×3
----------------
2^4 × 3^2 = 16×9 = 144
144 + 6 = 150
1 + 2 + 3 +...+150= 150×151 : 2 = 75×151 = 11 325 (suma numerelor rostite)
Raspuns:
11 325