Keystones — Lintel
Five GCSE retrieval questions · 1 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00055 in standard form
Answer: 5.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.11cm -
4. Ratio Mixed ratio problems
£288.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 43, 22, 48, what is the missing number?
Answer: 43