Keystones — Lintel
Five GCSE retrieval questions · 25 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
780000
Answer: 7.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 46°. Find adjacent side
Answer: 20.8cm -
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: 38, 27, 34, 11, 31, 20, 36, 18
Answer: 26.9