Keystones — Lintel
Five GCSE retrieval questions · 30 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 49,000,000 in standard form
Answer: 4.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 36
Answer: (x + 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 10.79cm -
4. Ratio Mixed ratio problems
Express the second part of 2:9 as a fraction in simplest form
Answer: 9⁄11 -
5. Statistics Mean
Calculate the mean of: 15, 39, 38, 47, 37, 44, 36. Give your answer to 2 decimal places
Answer: 36.57