Keystones — Lintel
Five GCSE retrieval questions · 13 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.031 in standard form
Answer: 3.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 30.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3kg : 700g
Answer: 30:7 -
5. Statistics Mean
Calculate the mean of: 14, 9, 44, 33, 25, 37
Answer: 27