Keystones — Lintel
Five GCSE retrieval questions · 20 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
820000
Answer: 8.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 26°. Find adjacent side
Answer: 17.cm -
4. Ratio Mixed ratio problems
Simplify: 10:10:4
Answer: 5:5:2 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 46, 20, 29, what is the missing number?
Answer: 13