Question

in number 5,384, exchange the digit at tens place with the digit at the thousands place .what is the new number

Answer 1

What you have to do in this question is: you have to find the digits at tens place and thousands place and exchange their position. 

In 5384, 
unit digit = 4
tens digit = 8
hundreds digit = 3
thousands digit = 5

If we exchange tens and thousands digit, then 
unit digit = 4
tens digit = 5
hundreds digit = 3
thousands digit = 8

So new number will be 8354

Answer 2

answer is 8,354 as
5 is in thousands place
8 is in tens place when we interchange answer becomes
8,354