Keystones — Lintel
Five GCSE retrieval questions · 31 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 670,000 in standard form
Answer: 6.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 60
Answer: (x + 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 19.43cm -
4. Ratio Mixed ratio problems
£176.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £110.00 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 42, 29, 38, what is the missing number?
Answer: 31