Four objects appear in each puzzle—but one of them doesn't belong. Figure out what the other three have in common, spot the odd one out, and drag it into the trash bin. The answer may seem obvious at first, but the key is figuring out how the objects are connected. Look closely, think about what links them together, and enjoy the satisfying moment when the answer clicks. Take on 40 odd-one-out puzzles and see how many you can sort out!