Keystones — Lintel
Five GCSE retrieval questions · 19 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,900,000 in standard form
Answer: 8.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 6
Answer: (x - 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 11.62cm -
4. Ratio Mixed ratio problems
In ratio 7:4:3, what fraction is the first part?
Answer: 1⁄2 -
5. Statistics Mean
The mean of 5 numbers is 31. If 4 of them are 41, 35, 39, 31, what is the missing number?
Answer: 9