What are the different 4 digit number you can get from 0-9?

Answer 1

Every number from 1,000 to 9,999 can be made from the digits 0 - 9.

That means 10,000 numbers (0 through 9,999), minus the first 1,000 (0 through 999),

for a total of 9,000 numbers.

You can easily list them all. Simply write down all the counting numbers from 1,000 to 9,999 .