Keystones — Lintel
Five GCSE retrieval questions · 6 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 840,000 in standard form
Answer: 8.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.25cm -
4. Ratio Mixed ratio problems
£279.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £124.00 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 22, 18, 49, 39, 27, what is the missing number?
Answer: 13