Keystones — Lintel
Five GCSE retrieval questions · 5 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.026 in standard form
Answer: 2.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 24
Answer: (x + 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 17.79cm -
4. Ratio Mixed ratio problems
Express the second part of 7:5 as a fraction in simplest form
Answer: 5⁄12 -
5. Statistics Mean
Calculate the mean of: 31, 34, 42, 38, 48, 45. Give your answer to 2 decimal places
Answer: 39.67