Keystones — Cornerstone

Five GCSE retrieval questions · 19 September 2024 · mathsvault.uk/keystones

1. Number

Add: ²⁄₃ + ²⁄₆

Answer: ¹⁄₁
2. Algebra

For y = x³ + 11, calculate y when x = 4

Answer: y = 75
3. Geometry

Opposite = 8cm, hypotenuse = 16cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify: 20:20:12

Answer: 5:5:3
5. Statistics

Calculate the mean of: 14, 15, 10, 34, 20, 20, 5, 47

Answer: 20.6

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