Keystones — Lintel
Five GCSE retrieval questions · 3 February 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.037 in standard form
Answer: 3.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 55
Answer: (x - 5)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 7.79cm -
4. Ratio Mixed ratio problems
Simplify: 12:9:9
Answer: 4:3:3 -
5. Statistics Mean
Calculate the mean of: 44, 35, 30, 32, 14, 30. Give your answer to 2 decimal places
Answer: 30.83