Keystones — Lintel
Five GCSE retrieval questions · 2 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.057 in standard form
Answer: 5.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.11cm -
4. Ratio Mixed ratio problems
£154.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £110.00 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 37, 45, 25, 25, 33, what is the missing number?
Answer: 15