Keystones — Lintel
Five GCSE retrieval questions · 3 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.092 in standard form
Answer: 9.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 34.5cm -
4. Ratio Mixed ratio problems
£208.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £130.00 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 29, 19, 25, 50, what is the missing number?
Answer: 67