Keystones — Lintel
Five GCSE retrieval questions · 25 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0023
Answer: 2.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 35°. Find adjacent side
Answer: 31.cm -
4. Ratio Mixed ratio problems
In ratio 4:1:3, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 37, 14, 37, 42, 20, 25
Answer: 29.2