Keystones — Lintel
Five GCSE retrieval questions · 21 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00058
Answer: 5.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 35°. Find adjacent side
Answer: 18cm -
4. Ratio Mixed ratio problems
In ratio 4:2:3, what fraction is the second part?
Answer: 2⁄9 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 19, 30, 24, 21, 24, what is the missing number?
Answer: 44