Question 54

How many such digits are there in the number 57683421, each of which is as far away from the beginning of the number, as they will be when arranged in decreasing order within the number?

Solution

The number arranged in decreasing order is 87654321.

The digits 7,6,2 and 1 has the same distance from the beginning of the number even when arranged in decreasing order, the distances being 1,2,6 and 7 respectively.Thus, option D is correct.

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RRB 2009 Bhubaneswar

How many such digits are there in the number 57683421, each of which is as far away from the beginning of the number, as they will be when arranged in decreasing order within the number?

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