Keystones — Lintel
Five GCSE retrieval questions · 5 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 37,000,000 in standard form
Answer: 3.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.37cm -
4. Ratio Mixed ratio problems
Orange and purple sweets are in the ratio 3:10. What fraction of the sweets are purple?
Answer: 10⁄13 -
5. Statistics Mean
Calculate the mean of: 47, 27, 42, 13, 6, 28. Give your answer to 2 decimal places
Answer: 27.17