Keystones — Cornerstone

Five GCSE retrieval questions · 5 April 2023 · mathsvault.uk/keystones

1. Number

50000

Answer: 5 × 10⁴
2. Algebra

Factorise: 12x + 15

Answer: 3(4x + 5)
3. Geometry

Find the area of a circle with radius 4cm

Answer: 50.27cm²
4. Ratio

Simplify the ratio 25:30

Answer: 5:6
5. Statistics

Calculate the range of: 67, 112, 32, 32, 59, 68

Answer: 80

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