Keystones — Lintel
Five GCSE retrieval questions · 7 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000089 in standard form
Answer: 8.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
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 77 in the ratio 1:4:2
Answer: 11, 44 and 22 -
5. Statistics Mean
Calculate the mean of: 8, 32, 9, 35, 14, 36. Give your answer to 2 decimal places
Answer: 22.33