Keystones — Cornerstone
Five GCSE retrieval questions · 31 August 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 936 + 126
Answer: 936 + 126 = 1062 -
2. Algebra
Factorise: 32x + 20
Answer: 4(8x + 5) -
3. Geometry
Opposite = 6cm, hypotenuse = 6.9cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Find 77% of 246
Answer: 189.42 -
5. Statistics
A bag has 3 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 1⁄3