When I was a little kid, my Dad bought me one riddle book during his business trip. I was very fascinated by the riddles.
I remembered one time during the school activity of guessing riddles in the summer break, I guessed so many riddles right and won so many rewards that my shool teacher joked with me:" MF， please donot guess the riddles any more！You almost collected all of the rewards!"
In 3rd grade，I discovered one formula. If you gave me any odd number, I could tell the “x” and
“y” in the fomula of N(odd number) =X^2 -Y^2 right away. At that time, I was so excited that I thought I discovered the new continent!:)
Do you want to test me?
Feel free to test me now! I can give the answer of “X” and “Y” without a calculator right away!