Keystones — Lintel
Five GCSE retrieval questions · 10 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0007 in standard form
Answer: 7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 22
Answer: (x + 11)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.44cm -
4. Ratio Mixed ratio problems
Divide 126 in the ratio 4:4:1
Answer: 56, 56 and 14 -
5. Statistics Mean
Calculate the mean of: 33, 20, 30, 34, 45, 47, 8, 35
Answer: 31.5