Keystones — Lintel
Five GCSE retrieval questions · 28 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0083
Answer: 8.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 30°. Find adjacent side
Answer: 27.7cm -
4. Ratio Mixed ratio problems
In ratio 1:3:3, what fraction is the second part?
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 12, 10, 46, 29, 25, 16
Answer: 23