Keystones — Lintel
Five GCSE retrieval questions · 15 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0094 in standard form
Answer: 9.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.04cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m : 30cm
Answer: 70:3 -
5. Statistics Mean
Calculate the mean of: 13, 20, 9, 14, 5, 24. Give your answer to 2 decimal places
Answer: 14.17