Keystones — Lintel
Five GCSE retrieval questions · 28 October 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 94 + ? = 195
Answer: 101 -
2. Algebra
Factorise fully: 25x² + 10x
Answer: 5x(5x + 2) -
3. Geometry
Opposite = 12cm, adjacent = 11cm. Calculate the angle
Answer: 47.5° -
4. Ratio
Simplify: 15:6:12
Answer: 5:2:4 -
5. Statistics
A bag has 8 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 8⁄13