Keystones — Lintel
Five GCSE retrieval questions · 23 December 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,000,000 in standard form
Answer: 6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 63
Answer: (x + 9)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 18.09cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 90p
Answer: 20:9 -
5. Statistics Mean
Calculate the mean of: 49, 24, 19, 20, 36, 14, 44. Give your answer to 2 decimal places
Answer: 29.43