Keystones — Lintel
Five GCSE retrieval questions · 31 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 410,000,000 in standard form
Answer: 4.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 39.92cm -
4. Ratio Mixed ratio problems
Simplify: 12:24:16
Answer: 3:6:4 -
5. Statistics Mean
Calculate the mean of: 39, 16, 38, 41, 41, 16, 39. Give your answer to 2 decimal places
Answer: 32.86