Keystones — Lintel
Five GCSE retrieval questions · 19 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 620,000 in standard form
Answer: 6.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 16
Answer: (x + 8)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 39.81cm -
4. Ratio Mixed ratio problems
Simplify: 15:18:9
Answer: 5:6:3 -
5. Statistics Mean
Calculate the mean of: 47, 34, 30, 34, 37, 19, 18, 36. Give your answer to 2 decimal places
Answer: 31.88