Keystones — Lintel
Five GCSE retrieval questions · 29 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 350,000 in standard form
Answer: 3.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 99
Answer: (x + 11)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.95cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 700 ml
Answer: 10:7 -
5. Statistics Mean
Calculate the mean of: 23, 22, 5, 24, 10, 32, 36, 41. Give your answer to 2 decimal places
Answer: 24.13