Keystones — Lintel
Five GCSE retrieval questions · 11 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00006 in standard form
Answer: 6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 15.4cm -
4. Ratio Mixed ratio problems
Simplify: 6:6:12
Answer: 1:1:2 -
5. Statistics Mean
Calculate the mean of: 46, 15, 44, 33, 16, 49. Give your answer to 2 decimal places
Answer: 33.83