Keystones — Lintel
Five GCSE retrieval questions · 25 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00003 in standard form
Answer: 3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.22cm -
4. Ratio Mixed ratio problems
£266.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £76.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 49, 24, 26, 34, 21, what is the missing number?
Answer: 44