Keystones — Lintel
Five GCSE retrieval questions · 5 August 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 128 + 151
Answer: 128 + 151 = 279 -
2. Algebra
Factorise fully: 14x² + 8x
Answer: 2x(7x + 4) -
3. Geometry
Opposite = 18cm, adjacent = 20cm. Calculate the angle
Answer: 42° -
4. Ratio
Calculate 48.2% of 436
Answer: 210.15 -
5. Statistics
A bag has 6 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 3⁄5