Keystones — Lintel
Five GCSE retrieval questions · 25 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00057 in standard form
Answer: 5.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 22.66cm -
4. Ratio Mixed ratio problems
Express the first part of 4:12 as a fraction in simplest form
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 35, 42, 35, 31, 45, 12, 32. Give your answer to 2 decimal places
Answer: 33.14