19 or 20 ( if you count 66 as double)
19.
use the digit 1234to make two different numbers
There are 900 three-digit whole numbers between 1 and 1000
To find how many whole numbers between 1 and 100 use the digit 6 at least once, we can list them. The relevant numbers are: 6, 16, 26, 36, 46, 56, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 76, 86, 96. This gives us a total of 20 numbers that contain the digit 6 at least once.
There are 90 two-digit whole numbers between 1 and 100.
Infinitely many.
Assuming whole numbers and a leading zero does not count: 10,234,567
There aren't any digits between 6 and 7 that are divisible by 4. There aren't any whole numbers between 6 and 7, period.
0
Every six-digit number is greater than any five-digit number.
There are only 999 three digit whole numbers.
Any number between 100 & 999 inclusive !