Keystones — Lintel
Five GCSE retrieval questions · 12 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
270000
Answer: 2.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 49°. Find opposite
Answer: 23cm -
4. Ratio Mixed ratio problems
Divide 84 in the ratio 2:4:1
Answer: 24, 48 and 12 -
5. Statistics Mean
Calculate the mean of: 19, 21, 15, 43, 50, 48
Answer: 32.7