Keystones — Lintel
Five GCSE retrieval questions · 4 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0048
Answer: 4.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 49°. Find opposite
Answer: 34.5cm -
4. Ratio Mixed ratio problems
Simplify: 12:12:8
Answer: 3:3:2 -
5. Statistics Mean
Calculate the mean of: 19, 11, 32, 6, 50, 29, 7
Answer: 22