Keystones — Lintel
Five GCSE retrieval questions · 7 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
25000000
Answer: 2.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 50°. Find opposite
Answer: 13.cm -
4. Ratio Mixed ratio problems
In ratio 4:2:2, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
Calculate the mean of: 44, 45, 49, 13, 36, 30
Answer: 36.2