Keystones — Lintel
Five GCSE retrieval questions · 19 August 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
810000
Answer: 8.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 41°. Find adjacent side
Answer: 21.cm -
4. Ratio Mixed ratio problems
In ratio 3:1:1, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 34, 35, 40, what is the missing number?
Answer: -13