Keystones — Lintel
Five GCSE retrieval questions · 16 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 850,000 in standard form
Answer: 8.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 50
Answer: (x + 5)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.92cm -
4. Ratio Mixed ratio problems
Simplify: 4:4:8
Answer: 1:1:2 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 30, 35, 29, 19, 38, what is the missing number?
Answer: 11