Keystones — Lintel
Five GCSE retrieval questions · 12 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0087 in standard form
Answer: 8.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.28cm -
4. Ratio Mixed ratio problems
Simplify: 8:10:6
Answer: 4:5:3 -
5. Statistics Mean
Calculate the mean of: 23, 22, 8, 13, 12, 45
Answer: 20.5