Keystones — Lintel
Five GCSE retrieval questions · 4 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0067 in standard form
Answer: 6.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.47cm -
4. Ratio Mixed ratio problems
£132.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
Calculate the mean of: 45, 13, 29, 24, 9, 22, 10. Give your answer to 2 decimal places
Answer: 21.71