Keystones — Lintel
Five GCSE retrieval questions · 19 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0087 in standard form
Answer: 8.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 9.23cm -
4. Ratio Mixed ratio problems
£192.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
The mean of 6 numbers is 31. If 5 of them are 37, 17, 33, 34, 46, what is the missing number?
Answer: 19