Keystones — Lintel
Five GCSE retrieval questions · 12 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.016 in standard form
Answer: 1.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.65cm -
4. Ratio Mixed ratio problems
In ratio 3:11:10, what fraction is the third part?
Answer: 5⁄12 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 43, 43, 33, 46, 48, what is the missing number?
Answer: 15