Keystones — Lintel
Five GCSE retrieval questions · 8 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 93,000,000 in standard form
Answer: 9.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 66
Answer: (x + 11)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 8.09cm -
4. Ratio Mixed ratio problems
Express the first part of 10:15 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 13, 29, 6, 27, 35, 33. Give your answer to 2 decimal places
Answer: 23.83