Keystones — Lintel
Five GCSE retrieval questions · 17 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.018
Answer: 1.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 42°. Find opposite
Answer: 22.5cm -
4. Ratio Mixed ratio problems
Divide 203 in the ratio 2:3:2
Answer: 58, 87 and 58 -
5. Statistics Mean
Calculate the mean of: 46, 17, 15, 8, 42, 38, 45, 38
Answer: 31.1