Keystones — Lintel
Five GCSE retrieval questions · 6 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0064 in standard form
Answer: 6.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 132
Answer: (x + 12)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 28.4cm -
4. Ratio Mixed ratio problems
Express the first part of 3:11 as a fraction in simplest form
Answer: 3⁄14 -
5. Statistics Mean
Calculate the mean of: 37, 9, 39, 25, 38, 10. Give your answer to 2 decimal places
Answer: 26.33