Keystones — Lintel
Five GCSE retrieval questions · 27 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,700,000 in standard form
Answer: 2.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 20x + 96
Answer: (x - 8)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 15.82cm -
4. Ratio Mixed ratio problems
£168.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 17, 32, 42, what is the missing number?
Answer: 37