Keystones — Lintel
Five GCSE retrieval questions · 11 April 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 140,000,000 in standard form
Answer: 1.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.12cm -
4. Ratio Mixed ratio problems
£360.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £135.00 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 34, 50, 49, 37, what is the missing number?
Answer: 15