Keystones — Lintel

Five GCSE retrieval questions · 9 March 2025 · mathsvault.uk/keystones

1. Number

Calculate: 612 + 652

Answer: 612 + 652 = 1264
2. Algebra

Solve: ^x⁄₈ = 1

Answer: x = 8
3. Geometry

Find c if a = 19cm and b = 23cm in a right triangle

Answer: 29.8cm
4. Ratio

Simplify the ratio 8m:800cm

Answer: 1:100
5. Statistics

Calculate the mean of: 11, 21, 13, 23, 25, 33

Answer: 21

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