Keystones — Lintel
Five GCSE retrieval questions · 22 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.037 in standard form
Answer: 3.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 3
Answer: (x - 1)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.09cm -
4. Ratio Mixed ratio problems
Simplify: 12:20:8
Answer: 3:5:2 -
5. Statistics Mean
Calculate the mean of: 28, 14, 50, 27, 44, 17, 7. Give your answer to 2 decimal places
Answer: 26.71