Keystones — Lintel
Five GCSE retrieval questions · 1 November 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 740,000,000 in standard form
Answer: 7.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x + 6
Answer: (x + 3)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.67cm -
4. Ratio Mixed ratio problems
Simplify: 12:16:12
Answer: 3:4:3 -
5. Statistics Mean
Calculate the mean of: 48, 15, 19, 23, 23, 29, 50, 33
Answer: 30