Question

Which of the following is the pyramidal number sequence?
A. 1, 3, 6, 10, 15, ...

Answer 1

A. 1, 3, 6, 10, 15,21

Explanation:

they added 1 every time it continues

Answer 2

A

Explanation:

because if you were to do dots in a triangle shape they would fit (i don’t know if the makes any sense)