Keystones — Lintel
Five GCSE retrieval questions · 1 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 80,000,000 in standard form
Answer: 8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 20
Answer: (x + 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.14cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:4
Answer: 2:2:1 -
5. Statistics Mean
Calculate the mean of: 9, 38, 43, 44, 28, 13, 20, 19
Answer: 26.75