Keystones — Lintel
Five GCSE retrieval questions · 23 September 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 90. What are the numbers?
Answer: 29, 30, and 31 -
2. Algebra
Factorise: 9x² + 5x
Answer: x(9x + 5) -
3. Geometry
Opposite = 13cm, adjacent = 9cm. Calculate the angle
Answer: 55.3° -
4. Ratio
Find 46% of 465
Answer: 213.9 -
5. Statistics
Calculate the mean of: 10, 48, 26, 6, 17, 26, 41
Answer: 24.9