Keystones — Lintel
Five GCSE retrieval questions · 17 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 85,000,000 in standard form
Answer: 8.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 7.7cm -
4. Ratio Mixed ratio problems
Divide 78 in the ratio 2:1:3
Answer: 26, 13 and 39 -
5. Statistics Mean
Calculate the mean of: 23, 7, 36, 48, 9, 27
Answer: 25