Keystones — Lintel
Five GCSE retrieval questions · 24 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 700,000,000 in standard form
Answer: 7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 13.49cm -
4. Ratio Mixed ratio problems
Divide 189 in the ratio 3:3:1
Answer: 81, 81 and 27 -
5. Statistics Mean
Calculate the mean of: 21, 9, 34, 43, 19, 23, 24. Give your answer to 2 decimal places
Answer: 24.71