Looking to stay sharp this summer, any good brain teaser sites?

<p>I’d really like to stimulate the ol’ brain this summer to counteract some of the uh…“relaxing” that I will also be partaking in over the next few months. </p>

<p>I’m just wondering if any of you have any good sites that are filled with things like logic puzzles/math problems (I’ve completed calc BC but I’m really looking for AMC type questions, things that take more creativity than textook knowledge). I’d really like to do at least, on average, one a day, and would really like to wrestle with them. An example of the stuff I’m looking for might be the following LSAT problem: </p>

<p>Each day of a five-day workweek (Monday through Friday),
Anastasia parks for the entire day in exactly one of three
downtown parking lots—X, Y, and Z. One of the lots costs
$10 for the day, another costs $12, and the other costs $15.
Anastasia parks in each of the three lots at least once during
her workweek. The following conditions must apply:</p>

<p>On Thursday, Anastasia parks in the $15 lot.</p>

<p>Lot X costs more than lot Z.</p>

<p>The lot Anastasia parks in on Wednesday costs more than
the one she parks in on Friday.</p>

<p>Anastasia parks in lot Z on more days of the workweek
than she parks in lot X.</p>

<li>Which one of the following could be a complete and
accurate list of the days on which Anastasia parks in the
$10 lot?
(A) Monday
(B) Tuesday
(C) Monday, Tuesday
(D) Monday, Wednesday
(E) Monday, Thursday<br></li>
</ol>

<p>Oh, and does anyone think that doing this every day will result in my seeing any benefits? Thanks!</p>

<p>Oh, any books would be cool too...recommendations for things I could buy on Amazon maybe?</p>

<p>the mensa quiz a day book :)</p>

<p>Google "The impossible quiz."</p>

<p>I beat it already :(</p>

<p>[url=<a href="http://www.artofproblemsolving.com/Forum/resources.php%5DEnjoy.%5B/url"&gt;http://www.artofproblemsolving.com/Forum/resources.php]Enjoy.[/url&lt;/a&gt;] :D </p>

<p>/<em>comment</em>/</p>

<p>Thank you!</p>

<p>Online IQ tests aren't very accurate, but they're fun :)</p>