Keystones — Lintel
Five GCSE retrieval questions · 6 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.083 in standard form
Answer: 8.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
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
£132.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 44, 46, 41, 16, 20, what is the missing number?
Answer: 31