Keystones — Lintel
Five GCSE retrieval questions · 24 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00061
Answer: 6.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 51°. Find opposite
Answer: 35.8cm -
4. Ratio Mixed ratio problems
In ratio 3:1:3, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 46, 42, 31, 49, 24, 48, 46, 50
Answer: 42