Keystones — Lintel
Five GCSE retrieval questions · 7 June 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 71 + ? = 107
Answer: 36 -
2. Algebra
Solve: 8x = 80
Answer: x = 10 -
3. Geometry
Adjacent = 16cm, hypotenuse = 33cm. Find the angle
Answer: 61° -
4. Ratio
Calculate 17.3% of 358
Answer: 61.93 -
5. Statistics
A bag has 5 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 5⁄9