Keystones — Lintel
Five GCSE retrieval questions · 23 August 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0014 in standard form
Answer: 1.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.96cm -
4. Ratio Mixed ratio problems
Divide 184 in the ratio 3:4:1
Answer: 69, 92 and 23 -
5. Statistics Mean
Calculate the mean of: 16, 41, 23, 43, 19, 30, 35. Give your answer to 2 decimal places
Answer: 29.57