Keystones — Lintel
Five GCSE retrieval questions · 17 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 34,000,000 in standard form
Answer: 3.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 56
Answer: (x + 8)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.7cm -
4. Ratio Mixed ratio problems
In ratio 11:4:7, what fraction is the first part?
Answer: 1⁄2 -
5. Statistics Mean
Calculate the mean of: 28, 42, 14, 36, 21, 28, 31, 5. Give your answer to 2 decimal places
Answer: 25.63