Keystones — Cornerstone

Five GCSE retrieval questions · 29 November 2023 · mathsvault.uk/keystones

1. Number

Simplify: 2³ × 2³

Answer: 2⁶
2. Algebra

Solve: x + 8 = 23

Answer: x = 15
3. Geometry

Opposite = 20cm, adjacent = 18cm. Calculate the angle

Answer: 48°
4. Ratio

Calculate 10% of 160

Answer: 16
5. Statistics

Calculate the mean of: 21, 50, 31, 22, 7, 25

Answer: 26

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