Keystones — Lintel
Five GCSE retrieval questions · 15 July 2010 · 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 + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.26cm -
4. Ratio Mixed ratio problems
Orange, purple and pink sweets are in the ratio 1:2:2. What fraction of the sweets are purple?
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 43, 8, 44, 14, 36, 44, 44, 15
Answer: 31