Keystones — Lintel
Five GCSE retrieval questions · 29 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00054 in standard form
Answer: 5.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.03cm -
4. Ratio Mixed ratio problems
In ratio 6:10:8, what fraction is the third part?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 15, 5, 41, 33, 22, 10, 43. Give your answer to 2 decimal places
Answer: 24.14