Puzzles

 I have always wanted to practise math daily as puzzles. Looks like I have foudn the resource with Po-Shen Loh. 

Another resource to learn stuff from 3blue1brown so I can wonder later like like this professor looking at an old thing in a new way -

“What phase separation is allowing everyone to do is go back and look at old problems which stalled out and think: Can we now think about this a different way?” - Hyman

Lets solve this puzzle