Keystones — Lintel
Five GCSE retrieval questions · 27 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0042
Answer: 4.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 59°. Find adjacent side
Answer: 17cm -
4. Ratio Mixed ratio problems
In ratio 2:3:2, what fraction is the second part?
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 10, 42, 10, 49, 45, 10
Answer: 27.7