Keystones — Lintel
Five GCSE retrieval questions · 27 October 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 24,000 in standard form
Answer: 2.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 21
Answer: (x + 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.67cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 hours : 15 minutes
Answer: 16:1 -
5. Statistics Mean
Calculate the mean of: 19, 12, 23, 11, 11, 7. Give your answer to 2 decimal places
Answer: 13.83