Keystones — Lintel
Five GCSE retrieval questions · 4 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00041
Answer: 4.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 65°. Find adjacent side
Answer: 13.9cm -
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: 5, 14, 44, 27, 38, 15, 13, 49
Answer: 25.6