Keystones — Cornerstone

Five GCSE retrieval questions · 17 September 2023 · mathsvault.uk/keystones

1. Number

7000

Answer: 7 × 10³
2. Algebra

Expand: 3(2x + 8)

Answer: 6x + 24
3. Geometry

Opposite = 20cm, adjacent = 11cm. Calculate the angle

Answer: 61.2°
4. Ratio

Find 70% of 429

Answer: 300.3
5. Statistics

Find the mean of: 16, 19, 20

Answer: 18.333333333333

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