Question

4digit number reversed it become 3digit number what is the digit in ones place

Answer 1

firstly, the digit in ones place is zero........

Answer 2

taking four digit number having 0 in unit's place.
when you will reversing the number you will get 3 digit number.
for ex. 4350: 4- digit number
on reversing we get 0534,we know that 0 before a number has no significance,so it is a three digit number.
thus there are so many such numbers.
like
1230: on reversing gives 0321
1110:0111
2220:0222