Keystones — Lintel
Five GCSE retrieval questions · 28 September 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00003 in standard form
Answer: 3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.43cm -
4. Ratio Mixed ratio problems
£230.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £138.00 -
5. Statistics Mean
Calculate the mean of: 18, 42, 19, 10, 23, 33, 29. Give your answer to 2 decimal places
Answer: 24.86