Keystones — Lintel
Five GCSE retrieval questions · 12 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 46,000 in standard form
Answer: 4.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 7.5cm -
4. Ratio Mixed ratio problems
£156.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £52.00 -
5. Statistics Mean
The mean of 5 numbers is 23. If 4 of them are 19, 18, 27, 42, what is the missing number?
Answer: 9