Keystones — Lintel
Five GCSE retrieval questions · 31 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.056 in standard form
Answer: 5.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 45
Answer: (x - 5)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 8.69cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 750g
Answer: 8:3 -
5. Statistics Mean
Calculate the mean of: 12, 13, 12, 5, 48, 22, 39. Give your answer to 2 decimal places
Answer: 21.57