Keystones — Lintel
Five GCSE retrieval questions · 14 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00071
Answer: 7.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 57°. Find opposite
Answer: 23.cm -
4. Ratio Mixed ratio problems
In ratio 2:1:4, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 22, 16, 11, 15, 7, 27
Answer: 16.3