Keystones — Lintel
Five GCSE retrieval questions · 2 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 45,000,000 in standard form
Answer: 4.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x + 2
Answer: (x + 2)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 7.5cm -
4. Ratio Mixed ratio problems
Divide 91 in the ratio 2:3:2
Answer: 26, 39 and 26 -
5. Statistics Mean
Calculate the mean of: 9, 18, 33, 17, 25, 32. Give your answer to 2 decimal places
Answer: 22.33