Keystones — Lintel
Five GCSE retrieval questions · 19 February 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 990,000,000 in standard form
Answer: 9.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 60
Answer: (x + 12)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 26.07cm -
4. Ratio Mixed ratio problems
Simplify: 10:10:12
Answer: 5:5:6 -
5. Statistics Mean
Calculate the mean of: 26, 34, 47, 35, 6, 49, 44, 20. Give your answer to 2 decimal places
Answer: 32.63