Keystones — Lintel
Five GCSE retrieval questions · 2 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 510,000 in standard form
Answer: 5.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 40.01cm -
4. Ratio Mixed ratio problems
Simplify: 9:9:12
Answer: 3:3:4 -
5. Statistics Mean
Calculate the mean of: 37, 34, 23, 13, 37, 33, 42, 43
Answer: 32.75