Playing with mathematical sign
This is however not complicated I am sure this will not get in your head instantly Try it without using Google or YouTube and tell me if you can finish in 5-10 minutes.
School math is something I do not do everyday at work however it does involve whenever I am trying to solve some computing issue. Yesterday my colleague came with piece of paper to solve some very simple numbers by using mathematical sign. It look very simple but takes a bit while to figure out. I am sure mathematician, teachers, professors in this field will solve this in a minute. I find very interesting and also took me while for all except the number 8.
This is however not complicated I am sure this will not get in your head instantly Try it without using Google or YouTube and tell me if you can finish in 5-10 minutes.