Keystones — Lintel
Five GCSE retrieval questions · 20 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.062 in standard form
Answer: 6.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.37cm -
4. Ratio Mixed ratio problems
£220.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 45, 21, 16, what is the missing number?
Answer: 42