Keystones — Lintel
Five GCSE retrieval questions · 6 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 990,000 in standard form
Answer: 9.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 45
Answer: (x + 5)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.22cm -
4. Ratio Mixed ratio problems
In ratio 3:4:6, what fraction is the second part?
Answer: 4⁄13 -
5. Statistics Mean
Calculate the mean of: 19, 10, 30, 37, 40, 21. Give your answer to 2 decimal places
Answer: 26.17