Keystones — Cornerstone

Five GCSE retrieval questions · 4 February 2026 · mathsvault.uk/keystones

1. Number

Calculate: ¹⁄₉ + ⁷⁄₉

Answer: ⁸⁄₉
2. Algebra

Solve: x + 14 = 17

Answer: x = 3
3. Geometry

Opposite = 5cm, hypotenuse = 5.8cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 30:15

Answer: 2:1
5. Statistics

Find the mean of: 9, 15, 7, 14, 9

Answer: 10.8

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