Keystones — Lintel
Five GCSE retrieval questions · 18 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
7100000
Answer: 7.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 58°. Find adjacent side
Answer: 15.4cm -
4. Ratio Mixed ratio problems
In ratio 1:2:2, what fraction is the second part?
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 31, 48, 50, 39, 11, 9
Answer: 31.3