13:20

Shuffling Card Trick - Numberphile

27:31

Divisibility Tricks - Numberphile

11:44

Spheres and Code Words - Numberphile

6:06

Mind-boggling Card Trick (you can try at home)

13:38

5040 and other Anti-Prime Numbers - Numberphile

14:33

The Doomsday Algorithm - Numberphile

15:27

Euler Squares - Numberphile

11:13

Chinese Remainder Theorem and Cards - Numberphile