Not worthy of consideration.
36 of them.
To find the number of increasing numbers between 100 and 1000, we can consider the possible combinations of digits. There are 9 choices for the first digit (1-9), 9 choices for the second digit (0-9 excluding the first digit), and 9 choices for the third digit (0-9 excluding the first two digits). Therefore, the total number of increasing numbers is 9 x 9 x 9 = 729.
None. 3 digit numbers are not divisible by 19 digit numbers.
With a total of 90,000 five digit numbers, we can conclude that there is 45,000 EVEN five digit numbers.
There are five such numbers.
There are 21 two-digit prime numbers.
The answer will depend on how many digits there are in each of the 30 numbers. If the 30 numbers are all 6-digit numbers then the answer is NONE! If the 30 numbers are the first 30 counting numbers then there are 126 combinations of five 1-digit numbers, 1764 combinations of three 1-digit numbers and one 2-digit number, and 1710 combinations of one 1-digit number and two 2-digit numbers. That makes a total of 3600 5-digit combinations.
It would help to know which digit. 0 appears in 9 numbers and each of the others in 18 numbers.
There are 600 5-digit numbers divisible by 150.
17
There are 45 such numbers.
There are 84 such numbers.