Keystones — Lintel
Five GCSE retrieval questions · 6 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
78000000
Answer: 7.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 40°. Find adjacent side
Answer: 16.cm -
4. Ratio Mixed ratio problems
Simplify: 8:6:10
Answer: 4:3:5 -
5. Statistics Mean
Calculate the mean of: 15, 14, 5, 48, 8, 14, 20, 35
Answer: 19.9