Keystones — Lintel
Five GCSE retrieval questions · 9 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00091
Answer: 9.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 43°. Find adjacent side
Answer: 24.9cm -
4. Ratio Mixed ratio problems
In ratio 3:3:2, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 34, 13, 25, 40, 41, 35
Answer: 31.3