Keystones — Lintel
Five GCSE retrieval questions · 27 March 2025 · mathsvault.uk/keystones
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1. Number
Simplify: 5√2 - 2√2
Answer: 3√2 -
2. Algebra
Factorise: 7x² + 4x
Answer: x(7x + 4) -
3. Geometry
Opposite = 16cm, adjacent = 11cm. Calculate the angle
Answer: 55.5° -
4. Ratio
Calculate 37.4% of 639
Answer: 238.99 -
5. Statistics
A bag has 8 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 8⁄15