Keystones — Lintel
Five GCSE retrieval questions · 16 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00017
Answer: 1.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 47°. Find adjacent side
Answer: 21.cm -
4. Ratio Mixed ratio problems
Simplify: 9:18:12
Answer: 3:6:4 -
5. Statistics Mean
Calculate the mean of: 50, 22, 9, 18, 42, 6
Answer: 24.5