Keystones — Lintel
Five GCSE retrieval questions · 7 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 980,000,000 in standard form
Answer: 9.8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 30.72cm -
4. Ratio Mixed ratio problems
Simplify: 18:18:12
Answer: 3:3:2 -
5. Statistics Mean
Calculate the mean of: 47, 32, 35, 9, 50, 41, 39, 23
Answer: 34.5