Keystones — Lintel
Five GCSE retrieval questions · 8 November 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 70 + ? = 186
Answer: 116 -
2. Algebra
Factorise fully: 12x² + 18x
Answer: 3x(4x + 6) -
3. Geometry
Opposite = 10cm, adjacent = 18cm. Calculate the angle
Answer: 29.1° -
4. Ratio
Calculate 45.7% of 311
Answer: 142.13 -
5. Statistics
A spinner has 6 red, 5 blue and 2 green sections. Probability of landing on red?
Answer: 6⁄13