Australian performer Charles Gauci here performs a magic square routine he calls Super Sudoku. First, he has people call out various 3-digit numbers, which are placed in a diagonal. These are then totaled, and Mr. Gauci then quickly fills out the remaining squares so as to give that same total in many different directions!

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Here's an unusual and amazing feat of memorization by OneManSho! At first, it simply sounds like he's singing an opera in Latin or Italian. Even if you're not into opera, keep watching it! About the middle, you'll realize how familiar the song is, and how impressive a memorization feat this truly is!

OneManSho also performed this same feat with another song, but there are stronger visual clues in this video as to which song he's singing.



This idea has been done before, such as in Weird Al's Amish Paradise video (watch from 2:51 to 3:09), as well as the classic Swedish bookstore scene from Top Secret! (here it is the original way, if you're curious). However, OneManSho is doing it while making sense and without lip-synching!

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In our running Wetten, dass ... ? marathon, our next feature is 11-year-old David Öttinger. David is blindfolded, and when given the name of a country somewhere in the world, he can name every country that borders the named country!

If you want to learn this feat yourself, try practicing with Sporcle's geography games.

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In our final Wetten, dass ... ? clip for the day, Florian Osmani performs the classic Day of the Week For Any Date feat. 8-year-old Florian bets that he can name the day of the week for any date from October 15, 1582 to December 31, 3499. If you've learned and practiced this feat, see if you can get the dates without looking at the video!

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Here's an interesting challenge from Wetten, dass ... ?. Before going on the air, Boris Konrad memorized 5 unsolved Sudoku puzzles. In the clip itself, he is shown 100 solved Sudoku puzzles, and has 4 minutes to identify at least 4 of the 5 puzzles he memorized! Can he do it?

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