Keystones — Lintel
Five GCSE retrieval questions · 15 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00057 in standard form
Answer: 5.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 25.21cm -
4. Ratio Mixed ratio problems
£208.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £130.00 -
5. Statistics Mean
Calculate the mean of: 29, 8, 14, 24, 26, 23, 38, 40
Answer: 25.25