Keystones — Cornerstone

Five GCSE retrieval questions · 11 March 2022 · mathsvault.uk/keystones

1. Number

4000

Answer: 4 × 10³
2. Algebra

Solve: 5x + 5 = 4x + 15

Answer: x = 10
3. Geometry

Opposite = 11cm, adjacent = 12cm. Calculate the angle

Answer: 42.5°
4. Ratio

Simplify the ratio 20:25

Answer: 4:5
5. Statistics

Calculate the mean of: 29, 37, 16, 48, 43, 10, 24, 17

Answer: 28

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