11 of History's Toughest Riddles

Challenge your intellect with these difficult riddles and brainteasers. If you find yourself stuck, the solutions are provided at the end.

1. A Puzzling Hobbit Conundrum

Fans of Middle-earth are well aware that J.R.R. Tolkien had a penchant for intricate logic puzzles. The riddle exchange between Bilbo Baggins and Gollum in The Hobbit offers a series of perplexing challenges, with one of the most baffling being:

It cries without a voice, flutters without wings, bites without teeth, and mutters without a mouth.

Gollum

2. The Mad Hatter's Clever Conundrum

Among the most renowned riddles in literature is one that leaves readers exasperated—primarily because it lacks an answer! In Alice's Adventures in Wonderland, the Mad Hatter challenges Alice with this perplexing question:

“Why is a raven like a writing desk?”

The Mad Hatter

3. Oedipus's Intricate Challenge

In Sophocles’s Oedipus Rex, the protagonist faces the Sphinx's deadly riddle to spare his life and proceed to Thebes. Spoiler: he succeeds. The creature inquires: 

What moves on four legs in the morning, two at noon, and three in the evening?

The Sphinx

4. A Mystifying Harry Potter Challenge

The Harry Potter series is filled with witty wordplay and clever twists, making it fitting that a captivating riddle appears in the books. In The Goblet of Fire, J.K. Rowling pays homage to the Sphinx by including one in the Triwizard Tournament maze. Harry must solve this enigma:

First, consider someone who hides their true self, trades in secrets, and speaks only falsehoods. Next, identify what takes the longest to heal, lies at the heart of 'middle,' and marks the conclusion of 'end.' Lastly, think of the sound often made when searching for an elusive word. Combine these clues, and tell me: which creature would you refuse to kiss?

The Sphinx

5. Secrets Under Guard

This riddle, created by mathematician Raymond Smullyan, is known by various titles such as “A Fork in the Road,” “Heaven and Hell,” and “The Two Doors.” It gained significant popularity through its appearance in the 1986 film Labyrinth. The scenario is as follows: You encounter two identical doors, each guarded by an identical guard. One door leads to heaven, the other to hell. You are allowed to ask one guard one question before deciding which door to choose. One guard always tells the truth, while the other always lies. What question should you ask? 

6. A Riddle of Intimidation

This riddle was said to be a favorite of Teddy Roosevelt:

I communicate, yet I do not reveal my thoughts I hear words, but I do not comprehend ideas When I awaken, everyone sees me When I rest, everyone hears me Numerous heads rest upon my shoulders Countless hands are at my feet The strongest metal cannot shatter my appearance Yet the gentlest murmur can ruin me The faintest cry can be heard.

7. James Joyce’s Profound Puzzle

In Ulysses, Stephen Dedalus presents a riddle to his students. A word of advice: Don’t waste too much effort trying to solve this one. 

The rooster crowed The sky was blue: The bells in heaven Chimed eleven. It’s time for this weary soul to ascend to heaven.

Stephen Dedalus

8. The Riddle That Began It All

The origin of the first riddle is debated, but the ancient Sumerians are credited with creating one of the earliest. Their contribution to the world of logic puzzles is as follows:

There exists a house. You enter it blind and leave with sight. What could it be?

9. A Challenging Enigma

This classic puzzle dates back to 18th-century England, though many recognize it from Die Hard with a Vengeance.

As I journeyed to St Ives, I encountered seven wives; Each wife carried seven sacks, Each sack held seven cats, Each cat had seven kits: Kits, cats, sacks, and wives, How many were headed to St Ives?

10. Plato's Timeless Brain Teaser

In The Republic, the philosopher Plato mentions a well-known Greek riddle attributed to a figure named Panarces:

There is a tale of a being both man and not man Who saw yet did not see a creature both bird and not bird Perched on something both branch and not branch And struck yet did not strike it with an object both rock and not rock.

Panarces

11. Einstein's Puzzling Fish Riddle

The so-called “Einstein’s Riddle” poses a straightforward question: “Who owns the fish?” While it may not have been crafted by Einstein—sometimes it’s credited to Lewis Carroll, and it’s probable neither actually authored it—it remains a challenging puzzle. Some versions replace the fish with other animals, like zebras. Regardless of its origins, this riddle is notoriously difficult:

Here’s the scenario:

There are five houses, each a different color. In each house resides a person of a distinct nationality. Each homeowner drinks a unique beverage, smokes a specific cigar brand, and owns a particular pet. No two owners share the same pet, cigar brand, or beverage. The question is: Who owns the fish? Here are the clues: The Brit resides in the red house The Swede owns dogs The Dane enjoys tea The green house is immediately to the left of the white house The green house owner drinks coffee The Pall Mall smoker raises birds The yellow house owner smokes Dunhill The person in the center house drinks milk The Norwegian lives in the first house The Blend smoker lives next to the cat owner The horse owner lives next to the Dunhill smoker The BlueMaster smoker drinks beer The German smokes Prince The Norwegian lives next to the blue house The Blend smoker’s neighbor drinks water.

1. The wind

2. The Hatter doesn’t know the answer, and neither did Carroll initially. However, readers’ demand for a solution was so overwhelming that the author eventually devised one, which appeared in a preface:

Frequent inquiries have been made to me about whether an answer to the Hatter's Riddle exists, prompting me to document what I consider a fitting response: 'Because it can produce a few notes, though they are very flat; and it is never placed with the wrong end forward!' This, however, is merely an afterthought; the Riddle, as originally conceived, had no answer at all.”

Lewis Carroll

3. “Man: as a baby, he moves on all fours; as an adult, he walks on two legs; and in his later years, he relies on a cane.” 

4. A spider.

5. In Labyrinth, the protagonist (Sarah, played by Jennifer Connelly) solves the riddle correctly. She asks the left guard, “Would he [pointing to the right guard] tell me that this door leads to the castle?” The left guard confirms, allowing Sarah to deduce that he guards the door to “certain death.” While the logic can be complex, numerous online resources are available for those seeking a detailed explanation of the puzzle’s reasoning.

6. An actor 

7. “The fox burying his grandmother under a hollybush.” 

Do you understand? Dedalus’s students don’t, and many scholars argue that’s intentional. The riddle’s exaggerated complexity serves as a meta-commentary on riddles themselves. However, not all of James Joyce’s riddles in Ulysses are unsolvable. Leopold Bloom quips, “A good puzzle would be crossing Dublin without passing a pub.” This equally perplexing challenge was cracked by a software developer in 2011, who mapped Dublin’s pubs and used an algorithm to plot a route avoiding all pubs by at least 115 feet.

8. A school

9. One. As John McClane discovers, this is a classic deceptive question. If the narrator encounters the group heading to St. Ives, they must be traveling in the opposite direction, and the mathematical calculations are merely a clever distraction.

10. “A eunuch with poor eyesight spotted a bat resting on a reed and threw a pumice stone at it, missing his target,” according to Plato. It’s understandable if you didn’t guess this immediately. In Greek, the verb for “to hit” can also mean attempting to strike something.

11. The German. Here's an explanation.

A version of this article originally appeared in 2017; it has been updated for 2022.