Keystones — Lintel
Five GCSE retrieval questions · 1 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.045 in standard form
Answer: 4.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 21.45cm -
4. Ratio Mixed ratio problems
£308.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £132.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 26, 36, 31, 42, what is the missing number?
Answer: 30