Keystones — Lintel
Five GCSE retrieval questions · 17 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0013
Answer: 1.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 40°. Find adjacent side
Answer: 30.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 14, 29, 32, 37, 13, 24, 44
Answer: 27.6