Keystones — Lintel
Five GCSE retrieval questions · 2 March 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 40,000,000 in standard form
Answer: 4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 56
Answer: (x - 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.05cm -
4. Ratio Mixed ratio problems
£256.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 32, 31, 45, 16, what is the missing number?
Answer: 66