Keystones — Lintel
Five GCSE retrieval questions · 4 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
29000000
Answer: 2.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 31°. Find opposite
Answer: 7.8cm -
4. Ratio Mixed ratio problems
In ratio 1:2:2, what fraction is the second part?
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 18, 47, 25, 37, 41, 20
Answer: 31.3