Keystones — Lintel
Five GCSE retrieval questions · 19 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.033
Answer: 3.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 49°. Find adjacent side
Answer: 18.4cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 17, 40, 14, 38, 50, 45, 19, 43
Answer: 33.3