Keystones — Lintel
Five GCSE retrieval questions · 12 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0088 in standard form
Answer: 8.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 56
Answer: (x - 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 13.46cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 45 minutes
Answer: 20:3 -
5. Statistics Mean
Calculate the mean of: 39, 50, 5, 16, 47, 15. Give your answer to 2 decimal places
Answer: 28.67