Keystones — Lintel
Five GCSE retrieval questions · 24 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 51,000 in standard form
Answer: 5.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.42cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4kg : 850g
Answer: 80:17 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 19, 37, 33, what is the missing number?
Answer: 23