Keystones — Lintel
Five GCSE retrieval questions · 30 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.002 in standard form
Answer: 2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 33.88cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5kg : 150g
Answer: 100:3 -
5. Statistics Mean
Calculate the mean of: 13, 46, 14, 7, 7, 38, 30, 40. Give your answer to 2 decimal places
Answer: 24.38