Keystones — Lintel
Five GCSE retrieval questions · 31 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00081
Answer: 8.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 43°. Find adjacent side
Answer: 22.7cm -
4. Ratio Mixed ratio problems
Simplify: 18:12:12
Answer: 3:2:2 -
5. Statistics Mean
Calculate the mean of: 44, 44, 7, 26, 18, 39, 27, 38
Answer: 30.4