Keystones — Lintel
Five GCSE retrieval questions · 28 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 43,000 in standard form
Answer: 4.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 90
Answer: (x + 10)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 45°. Find opposite
Answer: 21cm -
4. Ratio Mixed ratio problems
Express the second part of 4:8 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 34, 37, 37, 31, 46, 21. Give your answer to 2 decimal places
Answer: 34.33