Keystones — Lintel
Five GCSE retrieval questions · 24 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.002 in standard form
Answer: 2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 27
Answer: (x + 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.48cm -
4. Ratio Mixed ratio problems
Simplify: 16:20:8
Answer: 4:5:2 -
5. Statistics Mean
Calculate the mean of: 47, 24, 29, 20, 40, 12, 16. Give your answer to 2 decimal places
Answer: 26.86