What is the similarity between “2 + 2 = 5” and your left hand?

A man is traveling with a fox and two chickens, if he leaves the fox alone with the chickens the fox will eat the chickens. He comes to a river and needs to cross it, he finds a small boat that can carry only him and one animal, how does he get himself, the fox and two chickens across the river safely?

How can you put 21 pigs in 4 pigpens and still have an odd number of pigs in each pen?

What 6-letter word has the same pair of letters in spots 1 and 5, a different pair in spots 2 and 6 and contains a ‘u’ in between?

You have two coins of equal size on a table, situated end to end vertically. If you roll the top coin around the bottom coin until it returns to its original position, how many times will it have rotated?