Keystones — Lintel
Five GCSE retrieval questions · 21 October 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 270,000,000 in standard form
Answer: 2.7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 36.37cm -
4. Ratio Mixed ratio problems
Divide 208 in the ratio 1:3:4
Answer: 26, 78 and 104 -
5. Statistics Mean
Calculate the mean of: 9, 27, 48, 25, 34, 26, 24. Give your answer to 2 decimal places
Answer: 27.57