Keystones — Lintel
Five GCSE retrieval questions · 5 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 350,000,000 in standard form
Answer: 3.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.17cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 350g
Answer: 20:7 -
5. Statistics Mean
Calculate the mean of: 33, 23, 22, 24, 24, 25, 5, 44
Answer: 25