Keystones — Lintel
Five GCSE retrieval questions · 24 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,200,000 in standard form
Answer: 5.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 36.96cm -
4. Ratio Mixed ratio problems
Express the second part of 4:7 as a fraction in simplest form
Answer: 7⁄11 -
5. Statistics Mean
Calculate the mean of: 41, 47, 50, 48, 37, 36, 48, 28. Give your answer to 2 decimal places
Answer: 41.88