Keystones — Lintel
Five GCSE retrieval questions · 23 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 490,000 in standard form
Answer: 4.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.61cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 2:3:11. What fraction of the counters are orange?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 35, 19, 43, 26, 49, 23, 35. Give your answer to 2 decimal places
Answer: 32.86