Keystones — Lintel
Five GCSE retrieval questions · 21 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,500,000 in standard form
Answer: 7.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 44
Answer: (x - 4)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 60°. Find adjacent side
Answer: 16cm -
4. Ratio Mixed ratio problems
Simplify: 18:15:6
Answer: 6:5:2 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 25, 32, 49, what is the missing number?
Answer: 38