Keystones — Lintel
Five GCSE retrieval questions · 19 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00034 in standard form
Answer: 3.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 33.32cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 550g
Answer: 20:11 -
5. Statistics Mean
Calculate the mean of: 5, 21, 40, 26, 8, 41, 41, 35. Give your answer to 2 decimal places
Answer: 27.13