Keystones — Lintel
Five GCSE retrieval questions · 7 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0006
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 40°. Find opposite
Answer: 15.cm -
4. Ratio Mixed ratio problems
Divide 70 in the ratio 2:2:3
Answer: 20, 20 and 30 -
5. Statistics Mean
Calculate the mean of: 44, 13, 9, 32, 40, 50, 43, 50
Answer: 35.1