Keystones — Lintel
Five GCSE retrieval questions · 8 October 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 730,000,000 in standard form
Answer: 7.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.85cm -
4. Ratio Mixed ratio problems
£216.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 29, 47, 20, 16, what is the missing number?
Answer: 53