Discussion
If all the digits are arranged in descending order in each number, which among the following corresponds to smallest number?
Answer: C
The number is 132.
Rearrange each number's digits in descending order:
324 → 432, 456 → 654, 572 → 752, 683 → 863, 726 → 762, 132 → 321.
The smallest result, 321, comes from 132. 683, 572 and 456 become 863, 752 and 654, all larger.
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