Keystones — Lintel
Five GCSE retrieval questions · 1 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 993 + 864
Answer: 1857 -
2. Algebra
Solve: 8x = 72
Answer: x = 9 -
3. Geometry
A circle has area 254.5cm². Find its radius (dp)
Answer: 9cm -
4. Ratio
Calculate 16.2% of 313
Answer: 50.71 -
5. Statistics
A bag has 4 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 4⁄11