Keystones — Lintel
Five GCSE retrieval questions · 22 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 72,000,000 in standard form
Answer: 7.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 72
Answer: (x + 8)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.86cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £144.00 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 48, 50, 26, what is the missing number?
Answer: 12