Keystones — Lintel
Five GCSE retrieval questions · 19 February 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
470000
Answer: 4.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 49°. Find opposite
Answer: 29.9cm -
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: 23, 6, 31, 18, 31, 39, 6
Answer: 22