Keystones — Cornerstone

Five GCSE retrieval questions · 23 July 2023 · mathsvault.uk/keystones

1. Number

Calculate: ⁹⁄₁₁ + ¹⁄₁₁

Answer: ¹⁰⁄₁₁
2. Algebra

Factorise: 5x² + 4x

Answer: x(5x + 4)
3. Geometry

Opposite = 7cm, hypotenuse = 14cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Calculate 25% of 72

Answer: 18
5. Statistics

Find the mean of: 13, 9, 17, 4, 15

Answer: 11.6

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