Keystones — Lintel
Five GCSE retrieval questions · 26 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 950,000 in standard form
Answer: 9.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 14.84cm -
4. Ratio Mixed ratio problems
Divide 232 in the ratio 2:3:3
Answer: 58, 87 and 87 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 29, 48, 16, 26, 23, what is the missing number?
Answer: 56