Keystones — Lintel
Five GCSE retrieval questions · 14 March 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 807 + 241
Answer: 807 + 241 = 1048 -
2. Algebra
Solve: x⁄5 = 1.4
Answer: x = 7 -
3. Geometry
Opposite = 11cm, adjacent = 20cm. Calculate the angle
Answer: 28.8° -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 4⁄9