Keystones — Lintel
Five GCSE retrieval questions · 5 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 744 + 483
Answer: 744 + 483 = 1227 -
2. Algebra
What is the next term? 2, 8, 32, 128, ...
Answer: 512 -
3. Geometry
Opposite = 17cm, adjacent = 17cm. Calculate the angle
Answer: 45° -
4. Ratio
Calculate 46.9% of 401
Answer: 188.07 -
5. Statistics
A bag has 6 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 6⁄13