Keystones — Lintel
Five GCSE retrieval questions · 7 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00084
Answer: 8.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 44°. Find opposite
Answer: 19.3cm -
4. Ratio Mixed ratio problems
In ratio 4:2:3, what fraction is the second part?
Answer: 2⁄9 -
5. Statistics Mean
Calculate the mean of: 34, 42, 37, 37, 42, 5
Answer: 32.8