Keystones — Lintel
Five GCSE retrieval questions · 14 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
29000
Answer: 2.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 34°. Find opposite
Answer: 9.4cm -
4. Ratio Mixed ratio problems
Simplify: 16:24:20
Answer: 4:6:5 -
5. Statistics Mean
Calculate the mean of: 16, 17, 9, 5, 36, 29, 45, 19
Answer: 22