Keystones — Cornerstone

Five GCSE retrieval questions · 24 August 2024 · mathsvault.uk/keystones

1. Number

140000

Answer: 1.4 × 10⁵
2. Algebra

Solve: x + 10 = 16

Answer: x = 6
3. Geometry

Find the area of a circle with radius 7cm

Answer: 153.94cm²
4. Ratio

Find 80% of 246

Answer: 196.8
5. Statistics

Calculate the mean of: 27, 42, 12, 12, 22, 36, 47, 18

Answer: 27

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