Keystones — Lintel
Five GCSE retrieval questions · 5 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,100,000 in standard form
Answer: 7.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x + 12
Answer: (x + 4)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.92cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:4
Answer: 2:2:1 -
5. Statistics Mean
Calculate the mean of: 10, 46, 25, 50, 47, 39. Give your answer to 2 decimal places
Answer: 36.17