Keystones — Lintel
Five GCSE retrieval questions · 24 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.034 in standard form
Answer: 3.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 27
Answer: (x + 9)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.87cm -
4. Ratio Mixed ratio problems
£294.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £196.00 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 28, 43, 21, 40, 31, what is the missing number?
Answer: 53