Keystones — Lintel
Five GCSE retrieval questions · 3 September 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 170,000 in standard form
Answer: 1.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 16.88cm -
4. Ratio Mixed ratio problems
Simplify: 6:6:10
Answer: 3:3:5 -
5. Statistics Mean
Calculate the mean of: 19, 31, 33, 32, 41, 34. Give your answer to 2 decimal places
Answer: 31.67