Understand Volume as Cubic Units Practice Test

Ms. Rodriguez shows her class a box that can hold exactly 36 unit cubes when packed completely full. She fills it with unit cubes until it is $$\frac{5}{6}$$ full, then removes 8 unit cubes. What is the volume of the remaining unit cubes in the box?

Tom built a tower using unit cubes in layers. Each layer has fewer cubes than the layer below it. The bottom layer has 9 unit cubes, the middle layer has 6 unit cubes, and the top layer has 3 unit cubes. If Tom adds one more layer on top with 2 unit cubes, what will be the volume of his complete tower?