Challenge your friends and family to find the odd fact out with these 50 general knowledge trivia challenges! The elephant is the world's largest land mammal. Elephant tusks are teeth, not horns. Elephants sleep up to 8 hours a day. Can you spot the odd fact out? Pull a card and ask the other players to identify which of three pieces of trivia is not actually true! With trivia challenges ranging from history to pop culture to geography and more, these cards will put your knowledge to the test.