The proposition is false. From 1 to 99, the digit 0 is NOT repeated 20 times!
The largest ten digit number with no repeated digits is '9876543210'.
The greatest 4-digit number with no repeated digits is... 9876
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
The largest ten digit number with no repeated digits is '9876543210'.
5 digit telephone numbers having at least one of their digits repeated is = total possible 5 digit telephone numbers - 5 digit telephone numbers without any digit being repeated. =(10*10*10*10*10)-(10*9*8*7*6) =100000-30240 =69760
The largest 10-digit number with no digit repeated is 9876543210 !
Since there are only five different digits, a 6-digit number can only be generated if a digit can be repeated. If digits can be repeated, the smallest 6-digit number is 111111.
The largest ten digit number with no repeated digits is '9876543210'.
987654321 is the highest nine-digit number with no repeated digits.
It is possible to create a 3-digit number, without repeated digits so the probability is 1.
97531
Well, honey, the largest 12-digit number with repeated digits allowed is 9,999,999,999,999. I mean, unless you want to get fancy and start throwing in letters or emojis, but I doubt that's what you're looking for. So there you have it, the biggest 12-digit number you can get with the same digit repeated over and over again.