Keystones — Lintel
Five GCSE retrieval questions · 1 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00083
Answer: 8.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 54°. Find opposite
Answer: 30.3cm -
4. Ratio Mixed ratio problems
In ratio 3:1:4, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 24, 33, 32, 21, 8, 37, 31
Answer: 26.6