Keystones — Lintel
Five GCSE retrieval questions · 11 August 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄2 + 1⁄2 + 2⁄3
Answer: 5⁄3 -
2. Algebra
Solve: x⁄8 = 4.25
Answer: x = 34 -
3. Geometry
Opposite = 16cm, adjacent = 16cm. Calculate the angle
Answer: 45° -
4. Ratio
Simplify: 12:9:12
Answer: 4:3:4 -
5. Statistics
A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 5⁄13