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Question

The positions of the first and fifth digits in the number $$97356842$$ are interchanged. Similarly the
positions of the second and the sixth digits are interchanged and so on. Which of the following will
be the second to the right of the seventh digit from the right end after rearrangement? 


A
7
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B
6
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C
5
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D
2
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Solution

The correct option is D $$2$$
Given: 97356842
The digits at first and fifth, the digits at second and sixth, the digits at third and seventh and the digits at fourth and eight are interchanged.
So, let us first do each of the interchangings we have, 
97356842
After interchanging first and fifth digits we get, 
67359842
After interchanging second and sixth digits we get,
68359742
After interchanging third and seventh digits we get,
68459732
After interchanging fourth and eighth digits we get,
68429735
So, Starting from right side, the digit at seven position is 8.
And second to the right of seventh digit is 2
$$\boxed{\therefore \text{option D, 2 is the correct answer}}$$.

Mathematics

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