Keystones — Cornerstone

Five GCSE retrieval questions · 7 April 2025 · mathsvault.uk/keystones

1. Number

Add: ⁵⁄₆ + ⁷⁄₈

Answer: ⁴¹⁄₂₄
2. Algebra

Solve: x + 11 = 28

Answer: x = 17
3. Geometry

Opposite = 10cm, hypotenuse = 20cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Calculate 50% of 139

Answer: 69.5
5. Statistics

Find the range of: 29, 17, 29, 12, 22

Answer: 17

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