The smallest, positive 5-digit whole number is 10,000
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The smallest 4-digit number is 1000, and the largest 4-digit number is 9999.
The smallest 3-digit even number is 100, which is divisible by 2.
The smallest 3-digit palindrome number is 101.
The smallest 3-digit palindrome is 101.
When the last digit of a significant digit is 5 and we need to round it, we follow a rule called "round half up". This means that we round the digit up to the nearest number if the digit before it is odd, and round down if it's even. For example, 2.5 would round up to 3, while 3.5 would also round up to 4.