Keystones — Lintel
Five GCSE retrieval questions · 16 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0002
Answer: 2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 49°. Find adjacent side
Answer: 13.cm -
4. Ratio Mixed ratio problems
Divide 224 in the ratio 1:2:1
Answer: 56, 112 and 56 -
5. Statistics Mean
Calculate the mean of: 37, 15, 20, 38, 45, 13, 27, 22
Answer: 27.1