Keystones — Lintel
Five GCSE retrieval questions · 19 September 2021 · mathsvault.uk/keystones
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1. Number
Simplify: 7√3 - 3√3
Answer: 4√3 -
2. Algebra
Factorise fully: 28x² + 16x
Answer: 4x(7x + 4) -
3. Geometry
Find c if a = 20cm and b = 13cm in a right triangle
Answer: 23.9cm -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
A bag has 3 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 3⁄11