Keystones — Lintel
Five GCSE retrieval questions · 12 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 530,000 in standard form
Answer: 5.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 28.24cm -
4. Ratio Mixed ratio problems
Divide 105 in the ratio 2:1:4
Answer: 30, 15 and 60 -
5. Statistics Mean
Calculate the mean of: 15, 42, 29, 22, 10, 33. Give your answer to 2 decimal places
Answer: 25.17