Keystones — Lintel
Five GCSE retrieval questions · 17 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.073 in standard form
Answer: 7.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 13.49cm -
4. Ratio Mixed ratio problems
£222.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £148.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 26, 44, 41, 46, what is the missing number?
Answer: 13