Keystones — Lintel
Five GCSE retrieval questions · 4 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000049 in standard form
Answer: 4.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30cm -
4. Ratio Mixed ratio problems
Express the second part of 15:12 as a fraction in simplest form
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 44, 16, 43, 37, 32, 13. Give your answer to 2 decimal places
Answer: 30.83