Keystones — Lintel
Five GCSE retrieval questions · 3 October 2022 · mathsvault.uk/keystones
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1. Number
Calculate: 991 + 780
Answer: 1771 -
2. Algebra
Factorise fully: 6x² + 21x
Answer: 3x(2x + 7) -
3. Geometry
Adjacent = 29cm, hypotenuse = 40cm. Find the angle
Answer: 43.5° -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
A bag has 6 red and 3 blue balls. What is the probability of picking a red ball?
Answer: 2⁄3