Keystones — Lintel
Five GCSE retrieval questions · 13 January 2023 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0037
Answer: 3.7 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 31°. Find adjacent side
Answer: 18.9cm -
4. Ratio Mixed ratio problems
In ratio 4:2:3, what fraction is the second part?
Answer: 2⁄9 -
5. Statistics Mean
Calculate the mean of: 20, 31, 23, 49, 44, 21, 15, 32
Answer: 29.4