Keystones — Lintel
Five GCSE retrieval questions · 19 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 36,000,000 in standard form
Answer: 3.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.92cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 850g
Answer: 20:17 -
5. Statistics Mean
Calculate the mean of: 43, 20, 50, 39, 30, 43, 47, 41. Give your answer to 2 decimal places
Answer: 39.13