Here you have a quick brain teaser…which num­ber should be placed in the emp­ty tri­an­gle to the right? This puz­zle works your exec­u­tive func­tions in your frontal lobes by using your pat­tern recog­ni­tion, hypoth­e­sis test­ing, and logic. Warn­ing: There can be more than one solution…but make sure what­ev­er you say works in all four triangles! The…