Sides, corners and cubes — Maths Olympiad practice

How to solve it

Know the shape numbers — “triangle 3, square 4, pentagon 5, hexagon 6, octagon 8; a cube has 6 faces, 12 edges and 8 corners”

1. Sides: triangle 3, square and rectangle 4, pentagon 5, hexagon 6, octagon 8. A flat shape has as many corners as sides.
2. Several of one shape: multiply (3 triangles → 3 × 3 = 9 sides).
3. Two kinds of shape: work each out, then add. A cube has 6 faces, 12 edges and 8 corners.

Use it for: Geometry counting questions in Class 2–5 papers, and spotting shapes around you.

Worked example: How many sides do 3 triangles and 2 hexagons have altogether? → 21

✏️ Practice

Work it out on paper, then tap the answer you think is right. Stuck? Press “Show me how” to see every step.

🏁 Topic 6 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 🔺 Shape Counter badge when you pass — and a certificate when you finish all 7 topics of Part 1 · Class 2–4. You can still take the test without signing in.

🖨️ Shapes Worksheet for Maths Olympiad Class 4

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)