Keystones — Lintel
Five GCSE retrieval questions · 28 April 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.029 in standard form
Answer: 2.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 14.84cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
Calculate the mean of: 23, 7, 15, 48, 20, 35, 27, 24. Give your answer to 2 decimal places
Answer: 24.88