Keystones — Lintel
Five GCSE retrieval questions · 8 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 96,000,000 in standard form
Answer: 9.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.62cm -
4. Ratio Mixed ratio problems
Simplify: 10:12:6
Answer: 5:6:3 -
5. Statistics Mean
Calculate the mean of: 45, 6, 17, 16, 34, 36. Give your answer to 2 decimal places
Answer: 25.67