Keystones — Lintel
Five GCSE retrieval questions · 16 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 960,000,000 in standard form
Answer: 9.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 27
Answer: (x + 9)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.35cm -
4. Ratio Mixed ratio problems
£369.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £164.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 28, 32, 35, 29, what is the missing number?
Answer: 36