Keystones — Lintel
Five GCSE retrieval questions · 9 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 61,000,000 in standard form
Answer: 6.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.26cm -
4. Ratio Mixed ratio problems
£296.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £185.00 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 38, 48, 23, 47, what is the missing number?
Answer: 29