Keystones — Lintel
Five GCSE retrieval questions · 27 September 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,100,000 in standard form
Answer: 4.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 60°. Find adjacent side
Answer: 9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m : 65cm
Answer: 80:13 -
5. Statistics Mean
Calculate the mean of: 33, 44, 6, 29, 39, 5, 43, 49
Answer: 31