Keystones — Lintel
Five GCSE retrieval questions · 18 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 85,000,000 in standard form
Answer: 8.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 3
Answer: (x + 1)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.76cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:6
Answer: 4:4:3 -
5. Statistics Mean
Calculate the mean of: 26, 18, 8, 12, 41, 22, 38. Give your answer to 2 decimal places
Answer: 23.57