Keystones — Lintel
Five GCSE retrieval questions · 1 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000072 in standard form
Answer: 7.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 110
Answer: (x + 11)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 21.75cm -
4. Ratio Mixed ratio problems
Express the second part of 5:2 as a fraction in simplest form
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 16, 33, 30, 42, 6, 41, 48, 46
Answer: 32.75