Keystones — Lintel
Five GCSE retrieval questions · 30 September 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0092 in standard form
Answer: 9.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 21x + 110
Answer: (x - 10)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 16.79cm -
4. Ratio Mixed ratio problems
Express the second part of 6:7 as a fraction in simplest form
Answer: 7⁄13 -
5. Statistics Mean
Calculate the mean of: 40, 5, 11, 17, 8, 5, 32. Give your answer to 2 decimal places
Answer: 16.86