<PRE><B>Question 1043089</B>
What are the 9 different two-digit numbers that can 
be formed using the digits 3,4 and 8?
&lt;pre&gt;&lt;font size=4&gt;&lt;b&gt;
To make a two digit number think of there 
being two blanks to fill in, like this:

_ _


We can choose to fill in the 
first blank in these 3 ways

&lt;u&gt;3&lt;/u&gt; _
&lt;u&gt;4&lt;/u&gt; _
&lt;u&gt;8&lt;/u&gt; _

For each of those 3 ways to fill in the the first
digit, there are 3 ways to fill in the second blank:

For 3&lt;/u&gt; _ the three ways to fill in the second blank
are:

&lt;u&gt;3&lt;/u&gt; &lt;u&gt;3&lt;/u&gt;
&lt;u&gt;3&lt;/u&gt; &lt;u&gt;4&lt;/u&gt;
&lt;u&gt;3&lt;/u&gt; &lt;u&gt;8&lt;/u&gt;

For &lt;u&gt;4&lt;/u&gt; _ the three ways to fill in the second blank
are:

&lt;u&gt;4&lt;/u&gt; &lt;u&gt;3&lt;/u&gt;
&lt;u&gt;4&lt;/u&gt; &lt;u&gt;4&lt;/u&gt;
&lt;u&gt;4&lt;/u&gt; &lt;u&gt;8&lt;/u&gt;

For 8&lt;/u&gt; _ the three ways to fill in the second blank
are:

&lt;u&gt;8&lt;/u&gt; &lt;u&gt;3&lt;/u&gt;
&lt;u&gt;8&lt;/u&gt; &lt;u&gt;4&lt;/u&gt;
&lt;u&gt;8&lt;/u&gt; &lt;u&gt;8&lt;/u&gt;

That&#39;s why there are 3 times 3 or 9 ways to fill
in the two blanks.  3 ways for the first digit,
times 3 ways to fill in the second digit.

33, 34, 38, 43, 44, 48, 83, 84, 88

Edwin&lt;/pre&gt;&lt;/font&gt;&lt;/b&gt; </PRE>