Keystones — Lintel
Five GCSE retrieval questions · 13 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,600,000 in standard form
Answer: 3.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 54
Answer: (x + 9)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 12.87cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 hours : 50 minutes
Answer: 12:5 -
5. Statistics Mean
Calculate the mean of: 40, 7, 43, 42, 27, 39, 10, 10
Answer: 27.25