Keystones — Lintel
Five GCSE retrieval questions · 21 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000062 in standard form
Answer: 6.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 6
Answer: (x - 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 16.87cm -
4. Ratio Mixed ratio problems
£300.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 27, 23, 47, what is the missing number?
Answer: 11