Keystones — Lintel
Five GCSE retrieval questions · 26 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 799 + 983
Answer: 799 + 983 = 1782 -
2. Algebra
Solve: 5x = 75
Answer: x = 15 -
3. Geometry
Adjacent = 29cm, hypotenuse = 43cm. Find the angle
Answer: 47.6° -
4. Ratio
Simplify: 10:12:12
Answer: 5:6:6 -
5. Statistics
A bag has 4 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 4⁄11