A quiz is the most fun way to find out. Make one in seconds, send the link, and let the bragging rights begin.
Under the heading Who knows the most? on the front page: making a quiz and sending its link to see who knows most. "Let the bragging rights begin" is playful: the fight for the honour of winning starts, so use the language's own idiom for it
Ein spurnarkapping er stuttligasti háttur at finna tað út. Ger eina á fáum sekundum, send leinkið, og lat stríðið um heiðurin byrja.