Keystones — Lintel
Five GCSE retrieval questions · 4 September 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 999 + 513
Answer: 1512 -
2. Algebra
Factorise fully: 4x² + 14x
Answer: 2x(2x + 7) -
3. Geometry
Opposite = 19cm, adjacent = 15cm. Calculate the angle
Answer: 51.7° -
4. Ratio
Calculate 49.9% of 771
Answer: 384.73 -
5. Statistics
A bag has 3 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 1⁄3