Keystones — Lintel
Five GCSE retrieval questions · 20 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.011
Answer: 1.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 62°. Find adjacent side
Answer: 12.7cm -
4. Ratio Mixed ratio problems
Express the first part of 2:5 as a fraction in simplest form
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 41, 23, 28, 42, 42, 23
Answer: 33.2