Keystones — Lintel
Five GCSE retrieval questions · 26 November 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
60000
Answer: 6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 39°. Find adjacent side
Answer: 17.9cm -
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: 34, 19, 41, 49, 22, 37
Answer: 33.7