Keystones — Lintel
Five GCSE retrieval questions · 9 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,500,000 in standard form
Answer: 7.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.56cm -
4. Ratio Mixed ratio problems
£336.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 17, 36, 38, what is the missing number?
Answer: 17