Keystones — Lintel
Five GCSE retrieval questions · 12 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 920,000 in standard form
Answer: 9.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.52cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5kg : 700g
Answer: 50:7 -
5. Statistics Mean
Calculate the mean of: 14, 50, 36, 50, 41, 8. Give your answer to 2 decimal places
Answer: 33.17