Required Mathematical Intelligence

Chapter 22 Cutting Watermelon

If you cut a watermelon 4 times, how many pieces can you cut into?How to cut?
[Answer: Generally, it can be cut into 14 pieces.The method is: from the top to the bottom, cut three knives in two pairs, with an angle of about 120 degrees between each knives.This cuts into 7 pieces (with one in the middle).Then cut across the middle.It is said that it can be cut into 15 pieces at most. Interested readers may wish to try it. ]
(End of this chapter)