Today, my mother said to me, "Xue Fei, play a game with you!" " "I said," good! "

Mother brought a round cardboard and fixed a pointer in the center of the cardboard with a nail. The cardboard is divided into 24 squares on average, in which 1-24 is written respectively. "Mom, what are the rules of the game?" "The rules of the game are simple: when the pointer points to an odd or even cell, the next number must be added. Adding up to a singular number means I win, and adding up to a double number means you win. "

I played more than a dozen times in a row and lost every time. "Why is it always singular?" I asked my mother. Mom said, "Think for yourself!" So, I racked my brains and finally reminded me: odd+even = odd. Now I understand that if the pointer turns to the singular case, then adding the next number is an even number; If the pointer points to an even grid, the next number added is singular. Therefore, when the pointer points to any grid, the total number is singular.