Things are getting noisy at your sister's sleepover.
They've been playing checkers and now everyone is shouting at everyone else – they're trying to decide who's the best player. The scores so far:
Lisa beat Amy and also Jenny
Amy beat Jill, Cindy, and Jenny
Jill beat Lisa and Cindy
Cindy beat Lisa and Jenny
Jenny beat Jill
Who's the champion? Shouting won't work, so figure it out for them before your mother has to come and quiet things down.
Solution
Make a table of wins and losses, as in the figure below. This makes it pretty clear. Amy is the only one who won more than she lost. She should be the champ.
