Ancient trick to calculate ANY square root
33:01
The Man Who Almost Broke Math (And Himself...)
25:52
The mystery of pi and 355/113
21:04
7 tricky puzzles that "only" a genius can solve!
1:01:39
Turning children's glue into drinkable alcohol
18:49
How to lie using visual proofs
26:31
30 Brilliant Moves IN A ROW
7:24
Calculating Square Root by Hand (Early Grades)
18:25