exam Maths Puzzle Numerical Ability

Verify that x = 2 is a root of multiplicity 3 of the equation x^4 - 4x^3 + 16x - 16 = 0. What is the other root?

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exam Other Question

The diameter of a well is 6 feet and the water is 7 feet deep.How many gallons of water are there in the well,reckoning 7.48 gallons to a cubic foot? A clothing manufacturer has some pure silk thread and some thread that is 85% silk. How many kilograms of each must be woven together to make 75kg. of a blend that is 96% silk?