Keystones — Lintel
Five GCSE retrieval questions · 6 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
410000
Answer: 4.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 59°. Find opposite
Answer: 46.6cm -
4. Ratio Mixed ratio problems
In ratio 1:2:1, what fraction is the second part?
Answer: 2⁄4 -
5. Statistics Mean
The mean of 6 numbers is 23. If 5 of them are 16, 22, 25, 20, 27, what is the missing number?
Answer: 28