Keystones — Lintel
Five GCSE retrieval questions · 15 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,200,000 in standard form
Answer: 8.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 4
Answer: (x + 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 25.21cm -
4. Ratio Mixed ratio problems
Red and blue sweets are in the ratio 14:3. What fraction of the sweets are red?
Answer: 14⁄17 -
5. Statistics Mean
Calculate the mean of: 27, 30, 13, 44, 6, 38, 36. Give your answer to 2 decimal places
Answer: 27.71