Keystones — Cornerstone

Five GCSE retrieval questions · 23 May 2026 · mathsvault.uk/keystones

1. Number

Calculate: ⁴⁄₁₀ + ²⁄₁₀

Answer: ³⁄₅
2. Algebra

Collect like terms: 3x + 4y + 3x + 6y

Answer: 6x + 10y
3. Geometry

Opposite = 7cm, hypotenuse = 9.9cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify: 16:8:20

Answer: 4:2:5
5. Statistics

Calculate the range of: 37, 63, 63, 79, 51, 48

Answer: 42

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