Keystones — Lintel
Five GCSE retrieval questions · 30 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 68,000,000 in standard form
Answer: 6.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 4
Answer: (x + 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 29.96cm -
4. Ratio Mixed ratio problems
Simplify: 12:9:12
Answer: 4:3:4 -
5. Statistics Mean
Calculate the mean of: 19, 5, 46, 48, 10, 8, 6, 11. Give your answer to 2 decimal places
Answer: 19.13