Keystones — Lintel
Five GCSE retrieval questions · 5 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0059 in standard form
Answer: 5.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.34cm -
4. Ratio Mixed ratio problems
In ratio 7:8:2, what fraction is the second part?
Answer: 8⁄17 -
5. Statistics Mean
Calculate the mean of: 26, 5, 18, 13, 39, 31, 5. Give your answer to 2 decimal places
Answer: 19.57