Keystones — Lintel
Five GCSE retrieval questions · 25 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
21000000
Answer: 2.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 50°. Find adjacent side
Answer: 22.5cm -
4. Ratio Mixed ratio problems
Simplify: 12:12:15
Answer: 4:4:5 -
5. Statistics Mean
Calculate the mean of: 49, 14, 14, 49, 46, 16
Answer: 31.3