Keystones — Lintel
Five GCSE retrieval questions · 12 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0012 in standard form
Answer: 1.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 20.02cm -
4. Ratio Mixed ratio problems
Simplify: 4:6:6
Answer: 2:3:3 -
5. Statistics Mean
Calculate the mean of: 17, 27, 21, 20, 42, 24, 33. Give your answer to 2 decimal places
Answer: 26.29