Keystones — Lintel
Five GCSE retrieval questions · 12 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 659 + 858
Answer: 659 + 858 = 1517 -
2. Algebra
What is the next term? 6, 18, 54, 162, ...
Answer: 486 -
3. Geometry
Adjacent = 25cm, hypotenuse = 37cm. Find the angle
Answer: 47.5° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 5⁄13