Keystones — Lintel
Five GCSE retrieval questions · 21 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0032
Answer: 3.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 37°. Find opposite
Answer: 20.3cm -
4. Ratio Mixed ratio problems
In ratio 2:3:3, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 39, 30, 13, 38, 14, 49, 45
Answer: 32.6