Keystones — Lintel
Five GCSE retrieval questions · 13 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
27000000
Answer: 2.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 45°. Find adjacent side
Answer: 19.cm -
4. Ratio Mixed ratio problems
Express the first part of 4:5 as a fraction in simplest form
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 12, 28, 36, 34, 26, 47, 36
Answer: 31.3