Keystones — Lintel
Five GCSE retrieval questions · 23 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00002 in standard form
Answer: 2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.11cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:4
Answer: 6:3:2 -
5. Statistics Mean
Calculate the mean of: 35, 34, 16, 5, 30, 26, 48. Give your answer to 2 decimal places
Answer: 27.71