Question

Lillian built a staircase out of blocks. She used 3 blocks to make the first step, 6 blocks to make the second step and 9 blocks to make the third step. If she continues using the same pattern, how many total blocks will she have used after making the fourth step?

Answer 1

C

Explanation:

Answer 2

30

Explanation:

if you take 3+6+9+12 you get 30