Question 413188
<pre><font face = "consolas" color = "indigo" size = 4><b>
The largest product has to be when the largest 
two digits 6 and 8 come first to contribute the
most number of tens possible.  So we just have 
to try these two possibilities:

  63         65
 <u>×85</u>        <u>×83</u> 
 315        195 
<u>5040</u>       <u>5200</u> 
5355       5395

and we see that the one on the right is the larger product.

Edwin</pre>