Keystones — Lintel
Five GCSE retrieval questions · 9 July 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 64 + ? = 177
Answer: 113 -
2. Algebra
Solve: 6x = 42
Answer: x = 7 -
3. Geometry
Adjacent = 18cm, hypotenuse = 27cm. Find the angle
Answer: 48.2° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 5⁄11