Keystones — Lintel
Five GCSE retrieval questions · 12 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.017 in standard form
Answer: 1.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x - 11
Answer: (x + 1)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.68cm -
4. Ratio Mixed ratio problems
£147.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
The mean of 5 numbers is 31. If 4 of them are 29, 24, 36, 30, what is the missing number?
Answer: 36