Keystones — Lintel
Five GCSE retrieval questions · 6 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 910,000,000 in standard form
Answer: 9.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x + 3
Answer: (x + 3)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 28.95cm -
4. Ratio Mixed ratio problems
Express the second part of 9:4 as a fraction in simplest form
Answer: 4⁄13 -
5. Statistics Mean
Calculate the mean of: 7, 49, 11, 30, 48, 16, 48, 24. Give your answer to 2 decimal places
Answer: 29.13