Keystones — Lintel
Five GCSE retrieval questions · 15 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
72000000
Answer: 7.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 59°. Find opposite
Answer: 25cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 17, 41, 19, 34, 41, 20, 32
Answer: 29.1