Keystones — Lintel
Five GCSE retrieval questions · 11 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,000,000 in standard form
Answer: 8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.11cm -
4. Ratio Mixed ratio problems
Simplify: 9:6:15
Answer: 3:2:5 -
5. Statistics Mean
Calculate the mean of: 45, 20, 35, 43, 18, 26. Give your answer to 2 decimal places
Answer: 31.17