Keystones — Lintel
Five GCSE retrieval questions · 18 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,900,000 in standard form
Answer: 3.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 8
Answer: (x + 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.26cm -
4. Ratio Mixed ratio problems
£234.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £130.00 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 18, 37, 48, what is the missing number?
Answer: 33