Keystones — Lintel
Five GCSE retrieval questions · 17 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00017 in standard form
Answer: 1.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 12.14cm -
4. Ratio Mixed ratio problems
Simplify: 12:10:4
Answer: 6:5:2 -
5. Statistics Mean
Calculate the mean of: 31, 50, 12, 30, 26, 34, 43, 10
Answer: 29.5