About
9+10=21 is a wrong answer math problem that was started on Vine, and quickly became a fad within the Vine community, later reaching to various places on the internet
Origin
The first Vine featuring this was uploaded around July 2014 by an unknown Viner. The content of the Vine features a man talking to a little boy saying he’s stupid. The boy replies that he isn’t, then the man asks him “what’s 9+10?”, and the kid answers “21”. The man then reaffirms his statement by saying “you stupid”.
Spread
After the original Vine gained notoriety in the community, several other Vines came around that featured the use of the audio and phrases in them.
Notable Examples
Other Vines
Other Videos
Images
