Keystones — Lintel
Five GCSE retrieval questions · 3 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
34000000
Answer: 3.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 54°. Find adjacent side
Answer: 16.5cm -
4. Ratio Mixed ratio problems
Express the first part of 3:4 as a fraction in simplest form
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 10, 18, 21, 12, 32, 6, 42
Answer: 20.1