Keystones — Lintel
Five GCSE retrieval questions · 16 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0071 in standard form
Answer: 7.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 16
Answer: (x + 8)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 32.34cm -
4. Ratio Mixed ratio problems
Simplify: 8:6:8
Answer: 4:3:4 -
5. Statistics Mean
Calculate the mean of: 27, 19, 18, 30, 11, 12, 44, 46. Give your answer to 2 decimal places
Answer: 25.88