Keystones — Lintel

Five GCSE retrieval questions · 25 March 2025 · mathsvault.uk/keystones

1. Number

Calculate: 555 + 529

Answer: 555 + 529 = 1084
2. Algebra

Solve: ^x⁄₇ = 2.8571428571429

Answer: x = 20
3. Geometry

Opposite = 12cm, adjacent = 10cm. Calculate the angle

Answer: 50.2°
4. Ratio

Calculate 49.3% of 509

Answer: 250.94
5. Statistics

Find the range of: -17, 36, -23, -7, -16

Answer: 59

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