Keystones — Lintel
Five GCSE retrieval questions · 25 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 48,000 in standard form
Answer: 4.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 120
Answer: (x + 10)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.17cm -
4. Ratio Mixed ratio problems
£176.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £110.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 35, 28, 38, 17, what is the missing number?
Answer: 47