Keystones — Lintel
Five GCSE retrieval questions · 1 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
21000000
Answer: 2.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 39°. Find opposite
Answer: 13cm -
4. Ratio Mixed ratio problems
In ratio 4:3:3, what fraction is the second part?
Answer: 3⁄10 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 35, 28, 38, 43, 26, what is the missing number?
Answer: -38