Keystones — Cornerstone
Five GCSE retrieval questions · 16 January 2026 · mathsvault.uk/keystones
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1. Number Multiplying fractions
Calculate: 2⁄12 × 6
Answer: 1 -
2. Algebra Expanding single brackets
Expand: 2(x + 9)
Answer: 2x + 18 -
3. Geometry Pythagoras — short side
Find b if a = 14cm and c = 19cm
Answer: 12.85cm -
4. Ratio Ratio given the difference
In ratio 3:2, the difference between shares is 27. What are the shares?
Answer: 81 and 54 -
5. Statistics Range
Calculate the range of: 59, 88, 37, 110, 112, 32
Answer: 80