Keystones — Lintel
Five GCSE retrieval questions · 31 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 930,000,000 in standard form
Answer: 9.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 18x + 77
Answer: (x - 7)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.79cm -
4. Ratio Mixed ratio problems
Simplify: 24:12:8
Answer: 6:3:2 -
5. Statistics Mean
Calculate the mean of: 26, 29, 23, 7, 6, 13, 28, 23. Give your answer to 2 decimal places
Answer: 19.38