Keystones — Cornerstone

Five GCSE retrieval questions · 20 February 2025 · mathsvault.uk/keystones

1. Number

Add: ²⁄₄ + ⁵⁄₆

Answer: ⁴⁄₃
2. Algebra

Solve: x + 11 = 25

Answer: x = 14
3. Geometry

Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 32:20

Answer: 8:5
5. Statistics

Calculate the mean of: 17, 47, 50, 46, 27, 29, 6, 5

Answer: 28.4

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