Keystones — Lintel
Five GCSE retrieval questions · 23 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
3700000
Answer: 3.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 52°. Find opposite
Answer: 19.2cm -
4. Ratio Mixed ratio problems
In ratio 1:4:2, what fraction is the second part?
Answer: 4⁄7 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 26, 24, 45, what is the missing number?
Answer: 65