Keystones — Cornerstone

Five GCSE retrieval questions · 2 March 2023 · mathsvault.uk/keystones

1. Number

Add: ⁶⁄₈ + ⁴⁄₆

Answer: ¹⁷⁄₁₂
2. Algebra

Solve: 7x = 63

Answer: x = 9
3. Geometry

Opposite = 12cm, hypotenuse = 17cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify: 6:18:6

Answer: 1:3:1
5. Statistics

Calculate the mean of: 19, 43, 17, 47, 21, 24, 21

Answer: 27.4

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