Keystones — Lintel
Five GCSE retrieval questions · 2 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 93,000 in standard form
Answer: 9.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 18x + 72
Answer: (x - 6)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.64cm -
4. Ratio Mixed ratio problems
£135.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £54.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 15, 43, 47, what is the missing number?
Answer: 19