Keystones — Lintel
Five GCSE retrieval questions · 10 October 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 111. What are the numbers?
Answer: 36, 37, and 38 -
2. Algebra
Factorise fully: 16x² + 24x
Answer: 4x(4x + 6) -
3. Geometry
Calculate the area of a circle with diameter 8cm
Answer: 50.27cm² -
4. Ratio
Find 33% of 271
Answer: 89.43 -
5. Statistics
Calculate the mean of: 7, 20, 9, 12, 28, 33
Answer: 18.2