Keystones — Lintel
Five GCSE retrieval questions · 27 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 770,000,000 in standard form
Answer: 7.7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 18x + 80
Answer: (x + 10)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.66cm -
4. Ratio Mixed ratio problems
Simplify: 15:15:18
Answer: 5:5:6 -
5. Statistics Mean
Calculate the mean of: 10, 21, 29, 44, 48, 14, 29, 19
Answer: 26.75