Keystones — Cornerstone

Five GCSE retrieval questions · 28 May 2024 · mathsvault.uk/keystones

1. Number

Add: ¹⁄₆ + ⁶⁄₈

Answer: ¹¹⁄₁₂
2. Algebra

Solve: 9x - 8 = 6x + 4

Answer: x = 4
3. Geometry

Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify: 10:10:8

Answer: 5:5:4
5. Statistics

Calculate the mean of: 40, 6, 47, 50, 16, 39, 30

Answer: 32.6

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