Keystones — Lintel
Five GCSE retrieval questions · 10 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 810,000,000 in standard form
Answer: 8.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.65cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 95p
Answer: 40:19 -
5. Statistics Mean
Calculate the mean of: 40, 42, 41, 35, 41, 5, 49, 23
Answer: 34.5