Keystones — Lintel
Five GCSE retrieval questions · 26 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 120,000,000 in standard form
Answer: 1.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.26cm -
4. Ratio Mixed ratio problems
£100.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £40.00 -
5. Statistics Mean
Calculate the mean of: 46, 35, 11, 13, 42, 40. Give your answer to 2 decimal places
Answer: 31.17