Keystones — Lintel
Five GCSE retrieval questions · 12 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,400,000 in standard form
Answer: 3.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 55
Answer: (x + 11)(x + 5) -
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
£336.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £240.00 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 39, 23, 18, 23, what is the missing number?
Answer: 27