Keystones — Lintel
Five GCSE retrieval questions · 22 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0054 in standard form
Answer: 5.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 108
Answer: (x + 12)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 14.78cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 hours : 50 minutes
Answer: 12:5 -
5. Statistics Mean
Calculate the mean of: 41, 20, 40, 48, 19, 49, 31. Give your answer to 2 decimal places
Answer: 35.43