This was the most fun to play! I spent an hour trying to get my points up. It definitely made me think about how to use the various mathematic functions to get to a total of 24. This not only teaches you to think quickly, but drills in your mathematical tables. The only problem I found with this one was that the face cards appeared to have different values than I am used to. Apparently, Jacks equal 11 points, Queens, 12, and Kings, 13 - but Aces represent only 1.