Keystones — Cornerstone
Five GCSE retrieval questions · 7 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 202 + 779
Answer: 202 + 779 = 981 -
2. Algebra
Find the next term: 22, 31, 40, 49, ...
Answer: 58 -
3. Geometry
Opposite = 11cm, hypotenuse = 15.6cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 10:6
Answer: 5:3 -
5. Statistics
A bag has 3 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 3⁄8