Keystones — Lintel
Five GCSE retrieval questions · 11 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000023 in standard form
Answer: 2.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 48
Answer: (x - 4)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.46cm -
4. Ratio Mixed ratio problems
In ratio 12:9:1, what fraction is the first part?
Answer: 6⁄11 -
5. Statistics Mean
Calculate the mean of: 41, 24, 48, 17, 39, 45, 23. Give your answer to 2 decimal places
Answer: 33.86