Keystones — Lintel
Five GCSE retrieval questions · 2 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
1400000
Answer: 1.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 53°. Find opposite
Answer: 17.3cm -
4. Ratio Mixed ratio problems
In ratio 2:4:1, what fraction is the second part?
Answer: 4⁄7 -
5. Statistics Mean
The mean of 4 numbers is 22. If 3 of them are 33, 15, 18, what is the missing number?
Answer: 22