Keystones — Lintel
Five GCSE retrieval questions · 19 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0074
Answer: 7.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 40°. Find opposite
Answer: 10.9cm -
4. Ratio Mixed ratio problems
In ratio 2:1:4, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 13, 45, 37, 30, 11, 39, 22
Answer: 28.1