Keystones — Lintel
Five GCSE retrieval questions · 12 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.05 in standard form
Answer: 5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 45
Answer: (x - 5)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 11.72cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 35 minutes
Answer: 12:7 -
5. Statistics Mean
Calculate the mean of: 26, 38, 36, 27, 42, 41, 27, 41
Answer: 34.75