Keystones — Lintel
Five GCSE retrieval questions · 7 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,300,000 in standard form
Answer: 5.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 22x + 120
Answer: (x + 12)(x + 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 10.97cm -
4. Ratio Mixed ratio problems
Simplify: 6:15:18
Answer: 2:5:6 -
5. Statistics Mean
Calculate the mean of: 49, 30, 41, 37, 19, 43, 31, 6
Answer: 32