Keystones — Lintel
Five GCSE retrieval questions · 19 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00004 in standard form
Answer: 4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 5
Answer: (x - 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.48cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 33, 30, 40, 38, 26, what is the missing number?
Answer: 31