Keystones — Lintel
Five GCSE retrieval questions · 21 February 2014 · 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 - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 32.11cm -
4. Ratio Mixed ratio problems
Simplify: 20:12:12
Answer: 5:3:3 -
5. Statistics Mean
Calculate the mean of: 17, 13, 33, 34, 48, 19. Give your answer to 2 decimal places
Answer: 27.33