Keystones — Lintel
Five GCSE retrieval questions · 8 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 646 + 206
Answer: 646 + 206 = 852 -
2. Algebra
Find the next term: 1, 4, 10, 19, ...
Answer: 31 -
3. Geometry
Adjacent = 16cm, hypotenuse = 33cm. Find the angle
Answer: 61° -
4. Ratio
Calculate 36% of 416
Answer: 149.76 -
5. Statistics
A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 5⁄11