Keystones — Lintel
Five GCSE retrieval questions · 24 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 82,000 in standard form
Answer: 8.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 12
Answer: (x - 1)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.33cm -
4. Ratio Mixed ratio problems
£135.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £54.00 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 28, 16, 19, 21, what is the missing number?
Answer: 26