Keystones — Lintel
Five GCSE retrieval questions · 6 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
4700000
Answer: 4.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 43°. Find opposite
Answer: 22.4cm -
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 38. If 4 of them are 16, 21, 30, 46, what is the missing number?
Answer: 77