Keystones — Lintel
Five GCSE retrieval questions · 19 February 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.016 in standard form
Answer: 1.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 19.2cm -
4. Ratio Mixed ratio problems
Simplify: 24:12:12
Answer: 2:1:1 -
5. Statistics Mean
Calculate the mean of: 13, 13, 24, 18, 44, 32, 30. Give your answer to 2 decimal places
Answer: 24.86