Keystones — Lintel
Five GCSE retrieval questions · 5 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000094 in standard form
Answer: 9.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 36
Answer: (x + 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.5cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 23, 39, 28, what is the missing number?
Answer: 30