Keystones — Lintel
Five GCSE retrieval questions · 2 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000052 in standard form
Answer: 5.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.66cm -
4. Ratio Mixed ratio problems
£185.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £74.00 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 21, 27, 34, what is the missing number?
Answer: 38