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Question

The smallest 4 digit number with different digits is _______________

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Solution

Answer : 1023

the smallest digit, other than 0, at thousand place to make smallest 4 digit number is 1.

As 1 is already used, smallest digit (0) can be used at hundred place.

similarly we can place 2 at tenth position and 3 at unit position.

So, smallest 4 digit number is 1023.


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