Keystones — Cornerstone

Five GCSE retrieval questions · 4 December 2025 · mathsvault.uk/keystones

1. Number

Calculate: ³⁄₇ + ³⁄₇

Answer: ⁶⁄₇
2. Algebra

Solve: x + 14 = 29

Answer: x = 15
3. Geometry

Opposite = 14cm, hypotenuse = 19.8cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify: 12:24:24

Answer: 1:2:2
5. Statistics

Calculate the mean of: 26, 36, 25, 48, 15, 39

Answer: 31.5

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