Keystones — Lintel
Five GCSE retrieval questions · 3 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 73,000,000 in standard form
Answer: 7.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 11.47cm -
4. Ratio Mixed ratio problems
£155.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £93.00 -
5. Statistics Mean
Calculate the mean of: 47, 16, 23, 7, 36, 7, 24, 9. Give your answer to 2 decimal places
Answer: 21.13