Keystones — Lintel
Five GCSE retrieval questions · 6 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 86,000 in standard form
Answer: 8.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 18.88cm -
4. Ratio Mixed ratio problems
Black, white and yellow sweets are in the ratio 3:2:7. What fraction of the sweets are white?
Answer: 1⁄6 -
5. Statistics Mean
Calculate the mean of: 41, 31, 13, 48, 42, 44, 30. Give your answer to 2 decimal places
Answer: 35.57