Keystones — Lintel
Five GCSE retrieval questions · 25 August 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 29,000 in standard form
Answer: 2.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 18
Answer: (x - 2)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.33cm -
4. Ratio Mixed ratio problems
Divide 75 in the ratio 3:1:1
Answer: 45, 15 and 15 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 20, 35, 49, what is the missing number?
Answer: 56