Question 14: Given the digits 2; 4; 0; 1 then what is the smallest 4-digit natural number formed?

The smallest 4-digit natural number formed is

+ Thousands is the smallest and non-zero digit, so the thousands digit is 1.

+ The hundreds digit is the smallest of the remaining three numbers, so it should be 0

+ Tens is the smallest digit of the remaining 2 numbers, so it is 2

+ The remaining unit digit is 4

So the number to find is 1024

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