Keystones — Lintel
Five GCSE retrieval questions · 9 January 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 30 + ? = 112
Answer: 82 -
2. Algebra
Solve: 8x = 48
Answer: x = 6 -
3. Geometry
Opposite = 8cm, adjacent = 20cm. Calculate the angle
Answer: 21.8° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
A bag has 3 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 1⁄3