Keystones — Lintel
Five GCSE retrieval questions · 16 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0096 in standard form
Answer: 9.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 17.77cm -
4. Ratio Mixed ratio problems
£376.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £141.00 -
5. Statistics Mean
Calculate the mean of: 37, 38, 45, 31, 5, 14, 31. Give your answer to 2 decimal places
Answer: 28.71