Keystones — Cornerstone

Five GCSE retrieval questions · 27 September 2022 · mathsvault.uk/keystones

1. Number

71000

Answer: 7.1 × 10⁴
2. Algebra

Solve: x + 14 = 25

Answer: x = 11
3. Geometry

Opposite = 11cm, adjacent = 17cm. Calculate the angle

Answer: 32.9°
4. Ratio

Simplify the ratio 15:20

Answer: 3:4
5. Statistics

Calculate the mean of: 26, 37, 38, 49, 36, 33, 26, 13

Answer: 32.3

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