Keystones — Cornerstone
Five GCSE retrieval questions · 21 December 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 80 + ? = 109
Answer: 29 -
2. Algebra
Factorise: 6x² + 7x
Answer: x(6x + 7) -
3. Geometry
Find the area of a circle with radius 7cm
Answer: 153.94cm² -
4. Ratio
Calculate 50% of 80
Answer: 40 -
5. Statistics
Find the range of: 29, 44, 29, 18, 29
Answer: 26