Keystones — Lintel
Five GCSE retrieval questions · 1 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
94000000
Answer: 9.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 35°. Find adjacent side
Answer: 14.7cm -
4. Ratio Mixed ratio problems
In ratio 1:3:1, what fraction is the second part?
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 38, 29, 13, 45, 36, 29, 42, 30
Answer: 32.8