Keystones — Lintel
Five GCSE retrieval questions · 11 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 280,000,000 in standard form
Answer: 2.8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 60°. Find adjacent side
Answer: 19cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m : 90cm
Answer: 20:9 -
5. Statistics Mean
Calculate the mean of: 44, 25, 16, 40, 6, 37, 37. Give your answer to 2 decimal places
Answer: 29.29