Keystones — Lintel
Five GCSE retrieval questions · 19 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.06 in standard form
Answer: 6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 22x + 120
Answer: (x - 10)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 31.13cm -
4. Ratio Mixed ratio problems
Simplify: 18:9:15
Answer: 6:3:5 -
5. Statistics Mean
Calculate the mean of: 46, 9, 7, 35, 15, 29, 12. Give your answer to 2 decimal places
Answer: 21.86