How many 1-inch unit cubes does Brittany need in all to make her cube?

Question

Some students are making solid figures with 1-inch unit cubes. Brittany is making a cube. She builds the first two layers of the cube as shown.

Answer 1

There are 6 cubes for each side. Each layer contains 36 cubes and she needs 6 layers, so she needs 6×36=216 cubes.