Keystones — Lintel
Five GCSE retrieval questions · 11 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.033
Answer: 3.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
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: 35, 37, 25, 13, 42, 14
Answer: 27.7