Keystones — Lintel
Five GCSE retrieval questions · 3 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 15,000,000 in standard form
Answer: 1.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.68cm -
4. Ratio Mixed ratio problems
£185.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £111.00 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 31, 46, 27, 38, 17, what is the missing number?
Answer: 33