Keystones — Lintel
Five GCSE retrieval questions · 11 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 76,000 in standard form
Answer: 7.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x - 24
Answer: (x + 2)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 8.77cm -
4. Ratio Mixed ratio problems
£100.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £40.00 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 18, 31, 45, what is the missing number?
Answer: 66