Keystones — Lintel
Five GCSE retrieval questions · 11 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 50,000 in standard form
Answer: 5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.18cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m : 75cm
Answer: 8:3 -
5. Statistics Mean
Calculate the mean of: 37, 49, 17, 38, 47, 29, 40, 6. Give your answer to 2 decimal places
Answer: 32.88