Keystones — Lintel
Five GCSE retrieval questions · 11 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00068 in standard form
Answer: 6.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 55
Answer: (x - 5)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 60°. Find adjacent side
Answer: 12.5cm -
4. Ratio Mixed ratio problems
Simplify: 15:9:6
Answer: 5:3:2 -
5. Statistics Mean
Calculate the mean of: 35, 46, 47, 45, 26, 13, 46. Give your answer to 2 decimal places
Answer: 36.86