Answer:
To build a 3-step staircase, Don used 6 blocks. This implies that each step requires 2 blocks (since 6 blocks / 3 steps = 2 blocks per step).
Explanation:
If Don wants to make a 6-step staircase, we can apply the same logic. Each step will also require 2 blocks.
Therefore, to make a 6-step staircase, Don will need:
2 blocks/step × 6 steps = 12 blocks