16Hit1600
Geometry and TrigonometryEasy–MediumSmall cubes packed in a larger cube

Geometry and Trigonometry practice question

A cube-shaped box has inside edges of 20 centimetres. It is packed completely full with solid cubes that have edges of 5 centimetres. How many of the small cubes fit in the box?

Answer: 64

4 cubes fit along each edge, so 4 × 4 × 4 = 64.

Common wrong answers

If you answered 4
4 counts one edge only.
If you answered 16
16 counts one layer only.
If you answered 80
80 divides 400 by 5, mixing area and length.

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