Keystones — Lintel
Five GCSE retrieval questions · 9 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
20000000
Answer: 2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 45°. Find adjacent side
Answer: 20.5cm -
4. Ratio Mixed ratio problems
Express the first part of 3:6 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 34, 43, 39, 14, 41, 28, 13, 45
Answer: 32.1