How many six digit numbers can be formed using the digits 0123456789 Example equals 123456 or 098765?

The number of six digit numbers that you can make from ten different digits if

repetitions of same digit on the six digit number is allowed is 1 000 000 numbers

(including number 000 000).

If no repetitions of the the same digit are allowed then you have:

10P6 = 10!/(10-6)! = 151 200 different six digit numbers(six digit permutations form 10 different digits).