Keystones — Lintel
Five GCSE retrieval questions · 30 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 310,000,000 in standard form
Answer: 3.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 88
Answer: (x + 11)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 13.99cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m : 65cm
Answer: 120:13 -
5. Statistics Mean
Calculate the mean of: 30, 16, 45, 14, 33, 7. Give your answer to 2 decimal places
Answer: 24.17