Keystones — Lintel
Five GCSE retrieval questions · 25 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0096 in standard form
Answer: 9.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 22.67cm -
4. Ratio Mixed ratio problems
Express the second part of 12:11 as a fraction in simplest form
Answer: 11⁄23 -
5. Statistics Mean
Calculate the mean of: 10, 13, 15, 26, 9, 41, 6, 48
Answer: 21