Keystones — Lintel
Five GCSE retrieval questions · 22 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0017 in standard form
Answer: 1.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 63
Answer: (x + 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.97cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 23, 18, 48, what is the missing number?
Answer: 43