Keystones — Lintel
Five GCSE retrieval questions · 25 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.03 in standard form
Answer: 3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 10.17cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 45 minutes
Answer: 4:1 -
5. Statistics Mean
Calculate the mean of: 10, 16, 35, 26, 48, 23. Give your answer to 2 decimal places
Answer: 26.33