Positive 3-digit numbers are any numbers between 100 and 999. They are not negative (no "-" sign in front) and are three digits.
It is -987. The smallest positive 3-digit integer with unique digits is 102.
there are 899 whole numbers that have three digits.
525
There are 5*4*3 = 60 such numbers.
900
2*3*3*3*3 = 162
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
from 3 digits (10x10) to 4 digits (99X99)
There are 5 numbers of 1 digit, 25 numbers of 2 digits, and 75 numbers of 3 digits. This makes 105 numbers in all.
8 digits just count the amount of numbers.
All of them.