Question 40: Given the digits 5,8,9,0, which of the following is the smallest natural number with four distinct digits formed?

Use the natural number notation to generate a four-digit natural number that satisfies the problem.

From the digits 5,8,9,0 to form the smallest natural number consisting of four different digits, then

+ Thousands is the smallest and non-zero digit, so the thousands digit is 5.

+ The hundreds digit is the smallest of the remaining three numbers, which is 0

+ The tens digit is 8 and the units digit is 9.

So the number to find is 5089.

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