Keystones — Lintel
Five GCSE retrieval questions · 19 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 520,000 in standard form
Answer: 5.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 30
Answer: (x + 10)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.79cm -
4. Ratio Mixed ratio problems
£220.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £132.00 -
5. Statistics Mean
Calculate the mean of: 11, 22, 28, 11, 40, 34, 28. Give your answer to 2 decimal places
Answer: 24.86