This is one way to solve the Brain Teaser.
Look at the graph. Only two teams won the same number of games. The clue says they are the Tigers and Bobcats. Each won 5 games. The clue says they played 10 games.
Subtract: 10 5 = 5
The other three teams are left. Of those, which one has won just one more game than another? One team won 7 games, and the other team won 6 games. They must be the Tigers and the Panthers.
One team is left. That team has won 2 games. It must be the Cheetahs.