Question

Form the smallest 4-digit numbers using the digits 9, 0, 5 and 3 (if repetition of digits is not allowed).

Answer 1

If we have to obtain the smallest number with the digits which include zero as one of the given digits, then we start putting smallest of all the given digits in the extreme left (smallest but not zero).

Therefore, out of 9, 0, 5 and 3, we will start the number with 3.

Now, put zero on the second place from left and then place the remaining digits in increasing order. Doing this, we will get:

3 0 5 9

as our required number.