Keystones — Lintel
Five GCSE retrieval questions · 12 August 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 92,000 in standard form
Answer: 9.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 72
Answer: (x + 8)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 14.06cm -
4. Ratio Mixed ratio problems
Simplify the ratio £1 : 45p
Answer: 20:9 -
5. Statistics Mean
Calculate the mean of: 37, 24, 15, 39, 24, 13. Give your answer to 2 decimal places
Answer: 25.33