Keystones — Lintel
Five GCSE retrieval questions · 20 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,800,000 in standard form
Answer: 8.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.39cm -
4. Ratio Mixed ratio problems
£175.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £125.00 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 49, 15, 31, what is the missing number?
Answer: 41