Question 769203
<pre>
Infinitely many, for you could pick million-digit numbers.


If you meant to say "having four digits", then: 

Pick the 1st digit any of 4 ways, 1, 2, 3, or 4.
Pick the 2nd digit any of 5 ways, 0, 1, 2, 3, or 4
Pick the 3rd digit any of 5 ways, 0, 1, 2, 3, or 4
Pick the 4th digit any of 2 ways, 1 or 3

Answer: 4×5×5×2 = 200 ways.

Edwin</pre>