Keystones — Lintel
Five GCSE retrieval questions · 19 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 630,000 in standard form
Answer: 6.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 32.01cm -
4. Ratio Mixed ratio problems
Simplify: 9:6:9
Answer: 3:2:3 -
5. Statistics Mean
Calculate the mean of: 30, 44, 48, 48, 30, 24, 41, 26. Give your answer to 2 decimal places
Answer: 36.38