Keystones — Lintel
Five GCSE retrieval questions · 8 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
6700000
Answer: 6.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 39°. Find opposite
Answer: 17cm -
4. Ratio Mixed ratio problems
In ratio 4:2:1, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 42, 23, 30, 36, 10, 50, 45, 10
Answer: 30.8