Keystones — Lintel
Five GCSE retrieval questions · 9 August 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 38,000,000 in standard form
Answer: 3.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 3
Answer: (x - 1)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 20.35cm -
4. Ratio Mixed ratio problems
Express the second part of 3:13 as a fraction in simplest form
Answer: 13⁄16 -
5. Statistics Mean
Calculate the mean of: 8, 21, 7, 26, 9, 11. Give your answer to 2 decimal places
Answer: 13.67