a Sudoku trick you should know!

[@jeremybrown6201]

Show how to use it please

[@jonnnyoutit487]

underrated, if its not inconvenient i think buying a good mic would help your channel a lot

[@JPiMaths]

It's definitely on my to do list! Thanks for flagging, will try and do some research on what a good not too expensive mic would be!

[@givrally]

Wow that's incredible

[@JPiMaths]

Agreed, I remember the first time I saw this I was mesmerised.

[@JPiMaths]

See the full video proof of this theorem here: kzbin.info/www/bejne/pmbYeH2sqJd7pZI