Keystones — Lintel
Five GCSE retrieval questions · 5 March 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,500,000 in standard form
Answer: 7.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 32
Answer: (x - 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 60°. Find adjacent side
Answer: 12.5cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:16
Answer: 1:1:2 -
5. Statistics Mean
Calculate the mean of: 14, 31, 27, 47, 24, 16, 8, 41
Answer: 26