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A tiler fixes tiles on floors. He lays 9 tiles in a 3 by 3 patch. A shop packs 27 cubes into a cube-shaped box.

This is Part I, Chapter 1: A Square and A Cube.

What you will learn

• A square number — the tile count of a square.
• The odd staircase — each new layer is the next odd number.
• A test that says no — the last digit rules some numbers out.
• Square roots — the side a square came from.
• Pairing primes — find a square root without guessing.
• In between — a number that sits between two squares.
• A cube number — the count of unit cubes in a cube.
• Cube patterns — odd numbers add up to cubes.
• Grouping in threes — find a cube root.
• Flat or filled — which count a job needs.

Each lesson has a lab, apart from the checkpoints, summary and quiz. Tap it or slide it, and watch.