Keystones — Lintel
Five GCSE retrieval questions · 25 June 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 180,000 in standard form
Answer: 1.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 72
Answer: (x + 8)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.71cm -
4. Ratio Mixed ratio problems
£324.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £180.00 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 44, 30, 25, what is the missing number?
Answer: 21