Keystones — Lintel
Five GCSE retrieval questions · 7 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000046 in standard form
Answer: 4.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 60°. Find adjacent side
Answer: 17cm -
4. Ratio Mixed ratio problems
Simplify: 8:20:16
Answer: 2:5:4 -
5. Statistics Mean
Calculate the mean of: 10, 24, 18, 35, 34, 43, 12. Give your answer to 2 decimal places
Answer: 25.14