Keystones — Lintel
Five GCSE retrieval questions · 17 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.041 in standard form
Answer: 4.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 24
Answer: (x - 2)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.89cm -
4. Ratio Mixed ratio problems
£230.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £92.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 49, 46, 19, 28, 33, what is the missing number?
Answer: 23