Keystones — Lintel
Five GCSE retrieval questions · 24 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0036 in standard form
Answer: 3.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 88
Answer: (x + 8)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 37.13cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:12
Answer: 2:2:3 -
5. Statistics Mean
Calculate the mean of: 28, 9, 20, 6, 38, 8, 36, 44. Give your answer to 2 decimal places
Answer: 23.63