Keystones — Cornerstone

Five GCSE retrieval questions · 19 December 2023 · mathsvault.uk/keystones

1. Number

Calculate: ⁵⁄₁₀ + ⁴⁄₁₀

Answer: ⁹⁄₁₀
2. Algebra

Solve: 5x = 30

Answer: x = 6
3. Geometry

Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 10:35

Answer: 2:7
5. Statistics

Find the mean of: 10, 8, 14, 4, 17

Answer: 10.6

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