Keystones — Lintel
Five GCSE retrieval questions · 4 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.094
Answer: 9.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 25°. Find adjacent side
Answer: 26.3cm -
4. Ratio Mixed ratio problems
In ratio 4:4:1, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 19, 9, 5, 10, 16, 25, 12
Answer: 13.7