Which number is larger? – Math puzzle
![](https://i.ytimg.com/vi/ecYy-3gxzhU/mqdefault.jpg)
18:39
Can you crack this beautiful equation? – University exam question
![](https://i.ytimg.com/vi/vciYyOeq1pM/mqdefault.jpg)
9:19
10th Grade Exam from Germany – Can you solve it?
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9:44
Kaprekar's Constant
![](https://i.ytimg.com/vi/AxwE7WBnwkA/mqdefault.jpg)
12:52
Test d'entrée à l'université de Harvard
![](https://i.ytimg.com/vi/ujMs7Pykyss/mqdefault.jpg)
7:56
The SAT Math Question That Only 1% Could Solve!
![](https://i.ytimg.com/vi/DXMemvc1m-I/mqdefault.jpg)
15:38
Which numbers are missing? – Math puzzle
![](https://i.ytimg.com/vi/0VVGjCTr8LI/mqdefault.jpg)
12:11
Math puzzle – Can YOU find the area?
![](https://i.ytimg.com/vi/Ea1_1aVfwl4/mqdefault.jpg)
6:23