Keystones — Lintel
Five GCSE retrieval questions · 12 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.071 in standard form
Answer: 7.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 14.28cm -
4. Ratio Mixed ratio problems
Divide 240 in the ratio 2:3:3
Answer: 60, 90 and 90 -
5. Statistics Mean
Calculate the mean of: 12, 27, 14, 50, 9, 30, 50, 42
Answer: 29.25