Keystones — Lintel
Five GCSE retrieval questions · 19 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.013 in standard form
Answer: 1.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 65°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.57cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 850 ml
Answer: 80:17 -
5. Statistics Mean
Calculate the mean of: 25, 18, 9, 23, 13, 36, 45, 45
Answer: 26.75