Keystones — Lintel
Five GCSE retrieval questions · 30 May 2025 · mathsvault.uk/keystones
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1. Number
Add: 1⁄5 + 1⁄4
Answer: 9⁄20 -
2. Algebra
Solve: x⁄4 = 4
Answer: x = 16 -
3. Geometry
Opposite = 18cm, adjacent = 17cm. Calculate the angle
Answer: 46.6° -
4. Ratio
Simplify: 20:20:8
Answer: 5:5:2 -
5. Statistics
A bag has 7 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2