Beate rearranges the five numbered pieces shown to display the smallest possible nine-digit number. Which piece does she place at the right-hand end?
A. 4 B. 8 C. 31 D. 59 E. 107
B
The smallest nine-digit number is obtained by Beate choosing a piece for the left-hand end whose first digit is as small as possible and then repeating this process. Therefore the pieces are arranged in the order and hence she places the piece with 8 on it at the right-hand end.
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