Keystones — Lintel
Five GCSE retrieval questions · 12 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 340,000 in standard form
Answer: 3.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(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
Orange and purple sweets are in the ratio 10:6. What fraction of the sweets are orange?
Answer: 5⁄8 -
5. Statistics Mean
Calculate the mean of: 37, 41, 16, 40, 20, 38, 21. Give your answer to 2 decimal places
Answer: 30.43