Keystones — Lintel
Five GCSE retrieval questions · 3 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 510,000 in standard form
Answer: 5.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 60°. Find adjacent side
Answer: 15.5cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:24
Answer: 1:1:3 -
5. Statistics Mean
Calculate the mean of: 14, 26, 41, 21, 45, 41, 6, 10
Answer: 25.5