Keystones — Lintel
Five GCSE retrieval questions · 5 March 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.06 in standard form
Answer: 6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 30
Answer: (x + 10)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.58cm -
4. Ratio Mixed ratio problems
Simplify: 4:10:6
Answer: 2:5:3 -
5. Statistics Mean
Calculate the mean of: 44, 50, 45, 45, 37, 41, 50, 48
Answer: 45