Keystones — Cornerstone
Five GCSE retrieval questions · 17 September 2026 · mathsvault.uk/keystones
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1. Number Multiplying fractions
Multiply: 5⁄6 × 2⁄4
Answer: 5⁄12 -
2. Algebra Expanding single brackets
Expand: 3(x + 7)
Answer: 3x + 21 -
3. Geometry Pythagoras — short side
In a right triangle, if c = 5cm and a = 3cm, find b
Answer: 4cm -
4. Ratio Ratio given the difference
In ratio 7:1, the difference between shares is 108. What are the shares?
Answer: 126 and 18 -
5. Statistics Range
Calculate the range of: 42, 56, 33, 48, 31, 84
Answer: 53