Keystones — Lintel
Five GCSE retrieval questions · 26 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 68,000,000 in standard form
Answer: 6.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 21x + 108
Answer: (x + 12)(x + 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 27.71cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 55 minutes
Answer: 60:11 -
5. Statistics Mean
Calculate the mean of: 46, 19, 35, 16, 15, 42, 36. Give your answer to 2 decimal places
Answer: 29.86