<p>At Central High School, the math club has 15 members and the chess club has 12 members. If a total of 13 students belong to only one of the two clubs, how many students belong to both clubs?</p>
<p>which was the August 1 2010’s daily question, and it turns out Aug 26, 2008 had the same one. I think it’s time I use the blue book…</p>
<p>If this is true, they used them two years apart. Even if someone had subscribed to the feature that long, it is unlikely that they would remember that question.</p>