Keystones — Lintel
Five GCSE retrieval questions · 6 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 43,000 in standard form
Answer: 4.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 20x + 99
Answer: (x - 9)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 18.89cm -
4. Ratio Mixed ratio problems
£378.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £210.00 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 44, 15, 44, what is the missing number?
Answer: 5