Keystones — Lintel
Five GCSE retrieval questions · 28 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0065 in standard form
Answer: 6.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.32cm -
4. Ratio Mixed ratio problems
£336.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £240.00 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 34, 43, 24, 31, what is the missing number?
Answer: 68