Keystones — Lintel
Five GCSE retrieval questions · 22 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 930,000,000 in standard form
Answer: 9.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 33.88cm -
4. Ratio Mixed ratio problems
£222.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £74.00 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 30, 34, 24, what is the missing number?
Answer: 32