Keystones — Lintel
Five GCSE retrieval questions · 7 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.078
Answer: 7.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 36°. Find adjacent side
Answer: 16.2cm -
4. Ratio Mixed ratio problems
Simplify: 9:12:6
Answer: 3:4:2 -
5. Statistics Mean
Calculate the mean of: 37, 8, 34, 6, 30, 28
Answer: 23.8