<p>On StackExchange.com we have puzzles-dedicated site <a href="https://puzzling.stackexchange.com/">https://puzzling.stackexchange.com/</a> and <a href="https://codegolf.stackexchange.com/">https://codegolf.stackexchange.com/</a> for coding puzzles, math puzzles <a href="https://math.stackexchange.com/questions/tagged/puzzle">appear on math.stackexchange.com</a> and have their own tag there. We <em>also have</em> <a href="https://stats.stackexchange.com/questions/tagged/puzzle" class="post-tag" title="show questions tagged &#39;puzzle&#39;" rel="tag">puzzle</a> but is was used only ten times... There are nice probability-related puzzles (<a href="http://xianblog.wordpress.com/" rel="nofollow noreferrer">Xi'an often solves them on his blog</a>), and one can easily produce multiple other such puzzles. They can be fun and they may become a nice feature of the site.</p>

<p>Are such puzzles on-topic on our site? They could be fun, but on another hand there are several risks:</p>

<ul>
<li>the site can get flooded with puzzles,</li>
<li>homework <a href="https://stats.stackexchange.com/questions/tagged/self-study" class="post-tag" title="show questions tagged &#39;self-study&#39;" rel="tag">self-study</a> questions may be posted as "puzzles" by lazy students who want the answer right away.</li>
</ul>

<p>What do you think?</p>
