Keystones — Lintel
Five GCSE retrieval questions · 17 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.011 in standard form
Answer: 1.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.77cm -
4. Ratio Mixed ratio problems
Simplify: 6:8:6
Answer: 3:4:3 -
5. Statistics Mean
Calculate the mean of: 15, 6, 25, 39, 43, 44, 47. Give your answer to 2 decimal places
Answer: 31.29