Keystones — Lintel
Five GCSE retrieval questions · 2 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0088 in standard form
Answer: 8.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.68cm -
4. Ratio Mixed ratio problems
Simplify: 12:15:6
Answer: 4:5:2 -
5. Statistics Mean
Calculate the mean of: 41, 25, 42, 34, 25, 48, 25, 26
Answer: 33.25