Keystones — Lintel
Five GCSE retrieval questions · 22 October 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 65,000 in standard form
Answer: 6.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 10
Answer: (x + 10)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 12.65cm -
4. Ratio Mixed ratio problems
£176.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 36, 16, 40, what is the missing number?
Answer: 16