Keystones — Lintel
Five GCSE retrieval questions · 20 July 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0056 in standard form
Answer: 5.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 10.16cm -
4. Ratio Mixed ratio problems
Simplify: 10:8:4
Answer: 5:4:2 -
5. Statistics Mean
Calculate the mean of: 19, 34, 27, 17, 25, 23, 21, 18
Answer: 23