Keystones — Lintel
Five GCSE retrieval questions · 21 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
25000
Answer: 2.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 29°. Find adjacent side
Answer: 34.cm -
4. Ratio Mixed ratio problems
In ratio 2:4:4, what fraction is the second part?
Answer: 4⁄10 -
5. Statistics Mean
Calculate the mean of: 29, 37, 49, 11, 17, 39, 31, 24
Answer: 29.6