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There are 900 three-digit numbers, all of which are between 99 and 3,000.
There are 238 - 1 = 237 numbers between 1 and 238. To find the number of digits, we need to consider the range of numbers from 1 to 9 (1-digit numbers), 10 to 99 (2-digit numbers), and 100 to 238 (3-digit numbers). There are 9 one-digit numbers, 90 two-digit numbers, and 139 three-digit numbers between 1 and 238, totaling 9 + 90 + 139 = 238 digits.
Nothing at all. They are just three single-digit numbers in a line with a space between each digit.
There are no three didgit numbers but there are 63 three digit numbers.
Using the digits of 1345678, there are 210 three digit numbers in which no digit is repeated.