Keystones — Lintel
Five GCSE retrieval questions · 21 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00046 in standard form
Answer: 4.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 12
Answer: (x - 1)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.96cm -
4. Ratio Mixed ratio problems
Simplify: 4:12:12
Answer: 1:3:3 -
5. Statistics Mean
Calculate the mean of: 12, 21, 13, 36, 34, 14, 36, 18
Answer: 23