Questão 1 - Quiz

1- Quais são os dez primeiros números triangulares?

a- 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, ...
b- 1, 3, 6, 9, 10, 15, 21, 28, 36, 45, ...
c- 3,6,10,15,21,28,36,45,55,58...
d- 1,3,6,10,15,28,36,45,55...