Question 210

How many such pairs of digits are there in the number 539816 each of which has as many digits between them in the number as when the digits are arranged in descending order within the number ?

Solution

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Number - '539816'

When the digits are arranged in descending order = 986531

There are 2 pairs of digits which have as many digits between them in the number as when the digits are arranged in descending order within the number

= (9,8) , (5,3)

=> Ans - (C)

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