Keystones — Lintel
Five GCSE retrieval questions · 5 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
23000
Answer: 2.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 43°. Find opposite
Answer: 17.7cm -
4. Ratio Mixed ratio problems
In ratio 2:4:1, what fraction is the second part?
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 29, 30, 6, 13, 32, 42, 23, 28
Answer: 25.4