Keystones — Lintel
Five GCSE retrieval questions · 25 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00088 in standard form
Answer: 8.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 16.09cm -
4. Ratio Mixed ratio problems
Simplify: 6:6:4
Answer: 3:3:2 -
5. Statistics Mean
Calculate the mean of: 12, 19, 11, 43, 19, 5, 32. Give your answer to 2 decimal places
Answer: 20.14