Question

Amy was playing with blocks and started with one blue square block and kept adding more blocks to create the following pattern sequence:

How many blocks would she need on the 10th step of the pattern?

Group of answer choices

21

33

37

262,144

Answer 1

21

Explanation:

The sequence starts from 1 blue block, then she added 4 blocks continuously four times;

1 + 4 * 4 blocks = 17 blocks.

then she added 4 blocks a fifth time;

( 17 + 4) blocks = 21 blocks