9 + 10 = 21 ? You Stupid . The Idiot and moron Test from the Famous Vine
Are you stupid or smart?
Now you can prove it by answering math questions like the kid in the famous vine.
The app has all the sounds of the famous vine.
Plays the "21" sound every time the answer is 21.
Try to find how 10 + 9 = 21 ?
Please share your scores with friends and prove that you are indeed smart.