Keystones — Lintel
Five GCSE retrieval questions · 12 December 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0068 in standard form
Answer: 6.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.05cm -
4. Ratio Mixed ratio problems
Simplify: 12:24:16
Answer: 3:6:4 -
5. Statistics Mean
Calculate the mean of: 43, 33, 8, 46, 6, 40. Give your answer to 2 decimal places
Answer: 29.33