Keystones — Lintel
Five GCSE retrieval questions · 25 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
6200000
Answer: 6.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 63°. Find adjacent side
Answer: 9.cm -
4. Ratio Mixed ratio problems
Simplify: 18:12:12
Answer: 3:2:2 -
5. Statistics Mean
Calculate the mean of: 19, 13, 31, 19, 35, 11, 28
Answer: 22.3