Keystones — Lintel
Five GCSE retrieval questions · 10 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
20000000
Answer: 2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 51°. Find adjacent side
Answer: 19.5cm -
4. Ratio Mixed ratio problems
Simplify: 8:16:12
Answer: 2:4:3 -
5. Statistics Mean
Calculate the mean of: 20, 38, 7, 26, 38, 36
Answer: 27.5