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There are 15 golden balls sitting at the connection points of triangles as shown in the figure. You need to take out a ball at first place as your choice. Then take a ball to jump over another ball to an empty position. Taking out the ball you just jumped over. You can not jump to the outside of the big triangle
For example, if you take out the ball at location 4 first, the ball at location 1 can jump over the ball at location 2 to take out the ball at location 2. The ball at location 7 then can jump over the ball at location 4 to take out the ball at location 4. Can you keep jumping and taking all balls out until only one ball left? |