Keystones — Cornerstone
Five GCSE retrieval questions · 29 January 2025 · mathsvault.uk/keystones
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1. Number
Calculate: -6 + (-8)
Answer: -14 -
2. Algebra
What is the next term? 6, 12, 24, 48, ...
Answer: 96 -
3. Geometry
Opposite = 6cm, hypotenuse = 12cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify the ratio 8:16
Answer: 1:2 -
5. Statistics
A bag has 8 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 8⁄15