Keystones — Lintel
Five GCSE retrieval questions · 28 July 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00078
Answer: 7.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 62°. Find adjacent side
Answer: 16cm -
4. Ratio Mixed ratio problems
In ratio 1:1:4, what fraction is the second part?
Answer: 1⁄6 -
5. Statistics Mean
Calculate the mean of: 32, 49, 29, 35, 18, 30, 24, 24
Answer: 30.1