Keystones — Cornerstone
Five GCSE retrieval questions · 20 April 2026 · mathsvault.uk/keystones
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1. Number Multiplying fractions
Calculate: 3⁄12 × 6
Answer: 3⁄2 -
2. Algebra Expanding single brackets
Expand: 3(x + 3)
Answer: 3x + 9 -
3. Geometry Pythagoras — short side
Find b if a = 10cm and c = 14cm
Answer: 9.8cm -
4. Ratio Ratio given the difference
In ratio 3:2, the difference between shares is 28. What are the shares?
Answer: 84 and 56 -
5. Statistics Range
Calculate the range of: 62, 39, 57, 41, 24, 60
Answer: 38