Keystones — Lintel
Five GCSE retrieval questions · 27 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 410,000 in standard form
Answer: 4.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.53cm -
4. Ratio Mixed ratio problems
£203.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £145.00 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 44, 48, 42, 18, what is the missing number?
Answer: 23