Measure Volume by Counting Cubes Practice Test

A rectangular prism made of unit cubes has a length that is twice its width. The width is 3 cubes, and the height is 4 cubes. If 8 cubes fall out from various positions, what is the remaining volume?

Marcus builds a rectangular prism using centimeter cubes. The base layer uses 18 cubes arranged in a rectangle. He builds the prism 4 layers high. Later, he discovers that 6 cubes from different layers are cracked and must be removed. What is the final volume in cubic centimeters?