NICL Administrative Officer (AO) Finance Exam 2013 Question paper

Question 86

If the sum of two numbers is 42 and their product is 437, then the absolute difference between the number is:

Solution

Let the two numbers be x and y.
Now, x+y = 42
x*y = 437
x*(42-x) = 437
42x - x^2 = 437
x^2 - 42x +437 = 0
We get x = 23 0r x = 19
i.e y = 19 or y = 23
Hence, the two numbers are 23 and 19.
Their difference = 23 -19 = 4
Therefore, the correct option is option B.
 


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