A dog in China has apparently learned to do difficult mathematical sums in his head before barking the answer.
Potato the two-year-old Samoyed, Yixing City , is able to add, subtract, multiply and divide, even though he has no experience of professional training at all.
His owner Lu Zesheng is the man who should take credit for Tudou's amazing capability in arithmetic and plays a series of routine games with Potato to show off the dog's talents.
Lu asked a few arithmetic questions which might be difficult for the kindergarteners, but Potato barked the correct answers at ease every time in response.
They included questions like how many digits ten million has, and how much is 3.44 plus 3.56.
