Keystones — Lintel
Five GCSE retrieval questions · 28 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 590,000 in standard form
Answer: 5.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 36
Answer: (x + 9)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 23.18cm -
4. Ratio Mixed ratio problems
£342.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £152.00 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 22, 17, 34, 34, what is the missing number?
Answer: 28