22, if leading 0s are disallowed. 24 if they are permitted.
There are 900 three-digit numbers, ranging from 100 to 999.
There are 5! = 120 such numbers.
There are 76 such numbers. Eight more if you allow numbers to start with 0.
There are 2000 such numbers.
The lists of numbers divisible by and not divisible by 600 are both infinite.
all odd numbers, which are infinite, are not divisible by two.
between 1 and 600 inclusive there are:300 numbers divisible by 2200 numbers divisible by 3100 numbers divisible by both 2 and 3400 numbers divisible by 2 or 3.
All real numbers are divisible by 2. Only the even numbers (there are infinitely many) are divisible by 2 without remainder.
How many numbers are divisible by 9 between 5 and 1000²
There are 2000 such numbers.
There are 600 5-digit numbers divisible by 150.
No prime numbers are divisible by 3. By definition a prime number isn't divisible by anything but itself and 1.