Keystones — Lintel
Five GCSE retrieval questions · 27 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.092 in standard form
Answer: 9.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 120
Answer: (x + 10)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 12.35cm -
4. Ratio Mixed ratio problems
£182.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £78.00 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 43, 15, 18, what is the missing number?
Answer: 32