Question

1,3,6,10,_,_,_,_.? e 2,6,18,54,_,_,_.?

Answer 1

1,3,6,10,15,21,28,36 (no começo somou 2 depois 3,4,5,6 e assim vai)
2,6,18,54,162,486,1458 (foi multiplicando por 3)