Keystones — Lintel
Five GCSE retrieval questions · 1 July 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0044 in standard form
Answer: 4.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 33
Answer: (x + 11)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.4cm -
4. Ratio Mixed ratio problems
Simplify: 10:8:4
Answer: 5:4:2 -
5. Statistics Mean
Calculate the mean of: 19, 20, 38, 9, 28, 16, 26, 32
Answer: 23.5