Keystones — Lintel
Five GCSE retrieval questions · 10 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.085
Answer: 8.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 38°. Find adjacent side
Answer: 28.4cm -
4. Ratio Mixed ratio problems
In ratio 3:3:1, what fraction is the second part?
Answer: 3⁄7 -
5. Statistics Mean
The mean of 5 numbers is 31. If 4 of them are 35, 35, 48, 29, what is the missing number?
Answer: 8