Keystones — Lintel
Five GCSE retrieval questions · 20 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
33000
Answer: 3.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 31°. Find adjacent side
Answer: 30.9cm -
4. Ratio Mixed ratio problems
In ratio 3:1:3, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 48, 19, 17, 39, 26, what is the missing number?
Answer: -17