SOLUTION: What is the one's digit of the smallest whole number larger than 1000 whose digits are all different? A. 0 B. 1 C. 3 D. 4

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Question 995331: What is the one's digit of the smallest whole number larger than 1000 whose digits are all different?
A. 0
B. 1
C. 3
D. 4

Answer by MathLover1(20850) About Me  (Show Source):
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the smallest whole number larger than 1000 whose digits are all different
we have 4-digit number and we will use digits 0,1,2, and3 to make a the smallest whole number larger than 1000
and, number is 1023
the one's digit is: 3
answer is: C.