Keystones — Lintel
Five GCSE retrieval questions · 4 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0091
Answer: 9.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 49°. Find opposite
Answer: 20.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 14, 49, 46, 33, 15, 15, 13, 15
Answer: 25