Keystones — Lintel
Five GCSE retrieval questions · 16 April 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,000,000 in standard form
Answer: 3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 7
Answer: (x - 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.09cm -
4. Ratio Mixed ratio problems
Simplify: 18:6:9
Answer: 6:2:3 -
5. Statistics Mean
Calculate the mean of: 41, 21, 39, 21, 46, 34, 38. Give your answer to 2 decimal places
Answer: 34.29