Keystones — Lintel
Five GCSE retrieval questions · 28 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000094 in standard form
Answer: 9.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 19x + 88
Answer: (x - 8)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 12.35cm -
4. Ratio Mixed ratio problems
Express the second part of 9:15 as a fraction in simplest form
Answer: 5⁄8 -
5. Statistics Mean
Calculate the mean of: 14, 11, 38, 17, 12, 48. Give your answer to 2 decimal places
Answer: 23.33