A 10cm x 10cm square is cut into four equal squares, and then one of those smaller squares is cut into four squares. The seven pieces are numbered from 1 to 7 so that the smallest squares have the largest numbers. The 10 x 10 square is used as a dart board and your dart skills are good enough that you will always hit within the 10 x 10 square. Q: What is the probability of hitting an even number at least twice in ten dart throws