Keystones — Lintel

Five GCSE retrieval questions · 26 March 2026 · mathsvault.uk/keystones

1. Number

Calculate: 661 + 527

Answer: 661 + 527 = 1188
2. Algebra

Solve: ^x⁄₄ = 4.25

Answer: x = 17
3. Geometry

Opposite = 8cm, adjacent = 18cm. Calculate the angle

Answer: 24°
4. Ratio

Simplify: 12:12:16

Answer: 3:3:4
5. Statistics

Calculate the mean of: 5, 20, 44, 47, 6, 15

Answer: 22.8

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