Keystones — Lintel
Five GCSE retrieval questions · 20 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
52000000
Answer: 5.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 41°. Find opposite
Answer: 13.9cm -
4. Ratio Mixed ratio problems
In ratio 1:1:2, what fraction is the second part?
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 29, 36, 46, 32, 28, 14, 20, 35
Answer: 30