Keystones — Lintel
Five GCSE retrieval questions · 11 October 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄3 + 2⁄5 + 3⁄4
Answer: 89⁄60 -
2. Algebra
Factorise fully: 8x² + 6x
Answer: 2x(4x + 3) -
3. Geometry
Opposite = 17cm, adjacent = 9cm. Calculate the angle
Answer: 62.1° -
4. Ratio
Simplify the ratio 6m:600cm
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