Keystones — Lintel
Five GCSE retrieval questions · 26 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,400,000 in standard form
Answer: 5.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.34cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
Calculate the mean of: 7, 36, 49, 37, 39, 17, 8. Give your answer to 2 decimal places
Answer: 27.57