Question 321453
<pre><b>
We can choose the 1st digit as 2,4,6, or 8.  That's 4 ways.
We can choose the 2nd digit as 0,2,4,6, or 8.  That's 5 ways.
We can choose the 3rd digit as 0,2,4,6, or 8.  That's 5 ways.

Answer 4*5*5 = 100 three-digit numbers with only even digits.

Edwin</pre>