Only if the final digit, after the decimal point, is zero.
102 is the smallest three digit number with different digits.
smallest 8 digit number with three different digits
The largest three digit prime number whose digits are all primes is 773.
The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987
Yes. But that is true only if the 100 digits do not include 0. Or, if 0 is included, then you consider "0n0" to be a three digit number. Most people would consider is to be a 2-digit number.
Three of them.
All five digit numbers have three digits. The smallest five digit whole number is 10,000