Keystones — Lintel
Five GCSE retrieval questions · 25 November 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 81,000 in standard form
Answer: 8.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 9cm -
4. Ratio Mixed ratio problems
In ratio 10:5:1, what fraction is the first part?
Answer: 5⁄8 -
5. Statistics Mean
Calculate the mean of: 36, 29, 37, 33, 38, 46, 31, 17. Give your answer to 2 decimal places
Answer: 33.38