Keystones — Lintel
Five GCSE retrieval questions · 19 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 26,000 in standard form
Answer: 2.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 50
Answer: (x + 10)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 33.18cm -
4. Ratio Mixed ratio problems
In ratio 11:9:12, what fraction is the third part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 46, 37, 39, 31, 28, 20
Answer: 33.5