Keystones — Lintel
Five GCSE retrieval questions · 4 October 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,200,000 in standard form
Answer: 6.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 5
Answer: (x + 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.47cm -
4. Ratio Mixed ratio problems
Simplify: 12:8:20
Answer: 3:2:5 -
5. Statistics Mean
Calculate the mean of: 40, 29, 9, 8, 40, 9, 28, 43
Answer: 25.75