Keystones — Cornerstone

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

1. Number

Simplify: x³ × x⁴

Answer: x⁷
2. Algebra

Solve: 8x = 72

Answer: x = 9
3. Geometry

Opposite = 19cm, adjacent = 16cm. Calculate the angle

Answer: 49.9°
4. Ratio

Simplify: 16:8:12

Answer: 4:2:3
5. Statistics

Find the mean of: 8, 12, 7

Answer: 9

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