The smallest positive integer with four different digits is 1023. This number uses the smallest digits available (1, 0, 2, and 3) while ensuring that the first digit is not zero, thus maintaining its status as a positive integer.
It is -987. The smallest positive 3-digit integer with unique digits is 102.
45825
The answer is a negative or positive integer with one or two digits.
The largest composite integer before 100 is 99 - its positive integer factors are 1, 3, 9, 11, 33, 99.
1
The set of positive integers is {1, 2, 3, 4, 5, ...}. Because the values approach positive infinity there is no largest positive integer. If you pick any positive integer, you can always create a larger one by simply adding 1 to it. So there can be no largest positive integer.
-3
It is -987. The smallest positive 3-digit integer with unique digits is 102.
45825
The greatest 4 digit integer divisible by 3 (and therefore a multiple of 3) is 9999.
The largest factor of any positive integer is the number itself.
The first 3 digit integer being a positive multiple of 30 is 120. The final 3 digit integer being a positive multiple of 30 is 990. 990 - 120 = 870. 870 ÷ 30 = 29 But, as 29 is the difference between the two limits and the limits themselves are included then there are 29 + 1 = 30 such numbers.
The answer is a negative or positive integer with one or two digits.
The largest composite integer before 100 is 99 - its positive integer factors are 1, 3, 9, 11, 33, 99.
Let me first re-phrase your question: What is the number of (positive) integers less than 10000 (5 digits) and greater than 999 (3 digits)? The greatest 4 digit integer would be 9999. The greatest 3 digit integer would be 999. Let's do some subtraction: 9999 - 999 = 9000 This works because as we count up from 999, each positive integer encountered satisfies your requirements until reaching 10000.
9*9*9 = 729 ways.