For puzzles on spotting an odd-one-out item in a list.

In an Odd-one-out puzzle, the objective is to find a pattern in a list and to notice that one of the elements deviates from this pattern.

For example:

Sheep, Shark, Dog, Rock, Chicken, Dog, Elephant, Parrot, Mouse, Worm, Frog, Snake, Trout.

In this case the answer would be

Rock

All other items in the list are animals.