Keystones — Lintel
Five GCSE retrieval questions · 10 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 1,200,000 in standard form
Answer: 1.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 96
Answer: (x + 12)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 36.96cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:8
Answer: 6:3:4 -
5. Statistics Mean
Calculate the mean of: 45, 36, 5, 31, 40, 35, 38, 17. Give your answer to 2 decimal places
Answer: 30.88