Keystones — Lintel
Five GCSE retrieval questions · 22 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0009 in standard form
Answer: 9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 30
Answer: (x + 6)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 7.98cm -
4. Ratio Mixed ratio problems
£110.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
Calculate the mean of: 25, 29, 22, 27, 5, 20, 27, 28. Give your answer to 2 decimal places
Answer: 22.88