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Logic puzzles can be an actual work of art. It just takes a few simple elements put together in the right way to create a brainteaser that will entertain friends and families for hours. Not only do they test your wits, but they also make you think about things in a completely different way. And the best thing about mind puzzles is that you don’t need to be a smartass to solve them. Putting your brain to work is enough! You may need to use clues given in the questions and really focus on what these brain puzzles are asking you to do.

Today we want to challenge you with some of the most fantastic logic riddles we found scattered on the internet, including some that will really challenge your brain and force you to think outside the box. The answers to these logic problems often aren’t easy to come up with, but if you use your brain properly, there’s a good chance you’ll figure them out before too long! So let’s get started!

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#1

A buffalo standing in a field with a bird on its' back A man is caught on the king's property. He is brought before the king to be punished. The king says, "You must give me a statement. If it is true, you will be killed by lions. If it is false, you will be stomped by trampling of wild buffalo. If I can’t figure it out, I’ll have to let you go.” Sure enough, the man was released. What was the man's statement? 

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millennialkid avatar
Chicken Nugget
Chicken Nugget
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2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

OR stuff like “this statement is false” since if it were true then it would be false and now my brain hurts

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    #2

    Two fathers took their sons fishing. Each man and son caught one fish, but when they returned to camp there were only 3 fish. How could this be? (None of the fish were eaten, lost, or thrown back) 

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    #3

    You’re at a fork in the road in which one direction leads to the City of Lies (where everyone always lies) and the other to the City of Truth (where everyone always tells the truth). There’s a person at the fork who lives in one of the cities, but you’re not sure which one. What question could you ask the person to find out which road leads to the City of Truth? 

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    nuguanugua avatar
    Jiminy
    Jiminy
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Since you can ask the person as many questions as you want (nothing in the riddle states otherwise), I would simply ask "do I have blonde or brown hair?", and would know how to interpret all other answers.

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    J Baker
    J Baker
    Community Member
    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Hmm... Which city would be the city of lies? Washington DC?

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    larysaperih493 avatar
    Larysa Perih
    Larysa Perih
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    Verified     1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Answer: “Which direction do you live?” Someone from the City of Lies will lie and point to the City of Truth; someone from the City of Truth would tell the truth and also point to the City of Truth.

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    eglbukauskait avatar
    PADNA
    PADNA
    Community Member
    1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    In then end, you still won't kno. Both times you'd g oto the T city, but there is only 50% you'd meet that person.

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    amzhang avatar
    Down With Agent Hedgehog!
    Down With Agent Hedgehog!
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    If there’s a fork in the road where is the spoon? And the chopsticks? And the knife? And the plate? And the…

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    Ripley Walton
    Ripley Walton
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    2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    But you still wouldn't know where they came from, unless you can tell if they're lying or not

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    junwi avatar
    jun wi
    jun wi
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    The point is not to figure out where they came from though - it's to figure out which road leads to the city of truth

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    #4

    There are two ducks in front of a duck, two ducks behind a duck and a duck in the middle. How many ducks are there? 

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    #5

    Person in blue jeans and black socks You are about to leave for holiday, but you forgot socks! You race back to your room, but the power is off so you can't see sock colors. Never mind, because you remember that in your drawer there are ten pairs of green socks, ten pairs of black socks, and eleven pairs of blue socks, but they are all mixed up. How many of your socks do you need to take before you can be sure to have at least one matching pair? 

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    #6

    A farmer wants to cross a river and take with him a wolf, a goat and a cabbage. He has a boat, but it can only fit himself plus either the wolf, the goat or the cabbage. If the wolf and the goat are alone on one shore, the wolf will eat the goat. If the goat and the cabbage are alone on the shore, the goat will eat the cabbage. How can the farmer bring the wolf, the goat and the cabbage across the river without anything being eaten? 

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    erin_marie_hunter avatar
    Erin Hunter
    Erin Hunter
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Make cabbage soup. Take goat and soup across, and share soup with goat once you are both safely away from the wolf. Who wants to bring a g©£@#€d wolf with them, anyway? 😜😂

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    #7

    There are only two barbers in town. One of them has a nice, neatly trimmed head of hair. The other one's hair is a complete mess. Which of the two barbers should you go to and why? 

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    #8

    You have two ropes that each take an hour to burn, but burn at inconsistent rates. How can you measure 45 minutes? (You can light one or both ropes at one or both ends at the same time.) 

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    #9

    There is a lightbulb inside a closet. The door is closed, and you cannot see if the light is on or off through the door. However, you know the light is off to start. Outside of the closet, there are three light switches. One of the switches controls the lightbulb in the closet. You can flip the switches however you want, but once you open the door, you can no longer touch the switches. How do you figure out without a doubt which switch controls the light? 

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    samjuan_1 avatar
    Sam Juan
    Sam Juan
    Community Member
    2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    What if it's an LED bulb that doesn't get hot, or there's a short in the wiring?

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    #10

    A woman climbing the side of a mountain Abigail, Oliver, Rosa, and Blake all attend the same summer camp, where they can cook, kayak, rock climb, and zip-line. Each child has a different favorite activity. Abigail’s favorite activity isn’t rock climbing. Oliver is afraid of heights. Rosa can’t do her favorite activity without a harness. Blake likes to keep his feet on the ground at all times. Can you figure out who likes what? 

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    frogglyn avatar
    Dawn Duckworth
    Dawn Duckworth
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Simple logic puzzle. Love these. It's easier to solve them we with the chart.

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    #11

    There is a barrel with no lid and some wine in it. “This barrel of wine is more than half full,” says the woman. “No, it's not,” says the man. “It’s less than half full.” Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct? 

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    #12

    Five friends (Allegra, Ben, Clara, Flora, and Zach) are each allergic to something different: pollen, shellfish, bee stings, cats, or nuts. Allegra has a food allergy. Ben can play with his kitten for hours without issue (or medicine). Clara’s allergy is not related to animals. Flora has seasonal allergies. Can you figure out who is allergic to what? 

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    claytonj23 avatar
    Jennifer Clayton
    Jennifer Clayton
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Bees don't sting in winter, therefore pollen and been stings are both seasonal and Ben and Flora are interchangeable.

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    #13

    Four playing cards, one of each suit, lie face down on a table. They are a three, a four, a five, and a six. The cards on either side of the four are black. The club is to the right of the three but not next to it. The spade is to the left of the heart. The middle two cards add up to an even number. Neither of them is a club. Can you determine the cards’ suits and their order? 

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    #14

    The day before two days after the day before tomorrow is Saturday. What day is it today? 

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    #15

    A person standing in the middle of the woods with torch Four people are crossing a bridge at night, so they all need a torch—but they just have one that only lasts 15 minutes. Alice can cross in one minute, Ben in two minutes, Cindy in five minutes and Don in eight minutes. No more than two people can cross at a time; and when two cross, they have to go at the slower person’s pace. How do they get across in 15 minutes? 

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    habastien avatar
    Person
    Person
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    why do they all need a torch and how big is this dang bridge?

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    #16

    If five cats can catch five mice in five minutes, how long will it take one cat to catch one mouse? 

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    christinabeckley avatar
    K-Hey
    K-Hey
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    This is one of those ones where I figured it out in 20 seconds because it felt obvious, but then got confused by explaination- which seems to take the longest way around - then became inundated with self doubt (even though I had the same answer) and now I'm pretty sure we're all wrong, and it's 42 just to spite us.

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    #17

    A girl meets a lion and unicorn in the forest. The lion lies every Monday, Tuesday and Wednesday and the other days he speaks the truth. The unicorn lies on Thursdays, Fridays and Saturdays, and the other days of the week he speaks the truth. “Yesterday I was lying,” the lion told the girl. “So was I,” said the unicorn. What day is it? 

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    #18

    Jack is looking at Anne. Anne is looking at George. Jack is married, George is not, and we don’t know if Anne is married. Is a married person looking at an unmarried person? 

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    #19

    Each of five neighborhood dogs (Saber, Ginger, Nutmeg, Pepper, and Bear) is enjoying one of the following activities: getting its ears scratched, playing catch, taking a nap, burying a chew toy, and going for a walk. Pepper is either playing catch or burying a chew toy. Neither Ginger nor Saber nor Bear is on a walk. One of the dogs named after a spice is getting its ears scratched. A dog not named for a spice is playing catch. Bear is getting some exercise. Can you figure out what each pooch is doing? 

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    #20

    One US dollar banknote A person bought an item for $7, sold it for $8, bought it back for $9, and sold it for $10. How much profit did he make? 

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    myartists-bts avatar
    Mahnoor Maryam
    Mahnoor Maryam
    Community Member
    2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    He bought it Back... He made 1$ profit in first selling but as he BOUGHT IT BACK , bought 8$ thing in 9$ he actually lost that 1$ and then made Profit of 1$ Again. Total profit is only 1$. But can be 2$ too in some way

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    #21

    Six neighborhood children (Leisha, Benito, Delia, Charlotte, Weldon, and Zina) were measured yesterday. Weldon is taller than Delia but shorter than Zina. Leisha is taller than Benito but shorter than Delia and Weldon. Benito is not the shortest. Can you put them in order of height from tallest to shortest? 

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    #22

    There are five gears connected in a row, the first one is connected to the second one, the second one is connected to the third one, and so on. If the first gear is rotating clockwise what direction is the fifth gear turning? 

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    #23

    Three men are lined up behind each other. The tallest man is in the back and can see the heads of the two in front of him; the middle man can see the one man in front of him; the man in front can’t see anyone. They are blindfolded and hats are placed on their heads, picked from three black hats and two white hats. The extra two hats are hidden and the blindfolds removed. The tallest man is asked if he knows what color hat he’s wearing; he doesn’t. The middle man is asked if he knows; he doesn’t. But the man in front, who can’t see anyone, says he knows. How does he know, and what color hat is he wearing? 

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    talbutler2017 avatar
    Terry Butler
    Terry Butler
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Must assume the men know how many hats of each color they started with. Going from back to front: If the back man sees two white hats, he knows he is wearing a black hat, because there were only two white hats total. If the back man sees anything other than two white hats in front of him, he doesn't know what color he has. So the other two men know he didn't see two white hats on the two other men. If the middle man sees a white hat on the front man, he will know that he, the middle man, is wearing a black hat. Since the middle man can't say he knows what color hat he himself is wearing, the front man knows that he himself is not wearing a white hat. Thus, the front man is wearing a black hat.

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    #24

    Daniel, Emily, Marciano, and Christina are all wearing solid-colored shirts. Their shirts are red, yellow, green, and blue. Only the person wearing blue tells the truth, while the other three lie. They make the following statements: Daniel: “Marciano is wearing red.” Emily: “Daniel is not wearing yellow.” Marciano: “Emily is wearing blue.” Christina: “I will wear blue tomorrow.” Can you determine each person’s shirt color, and whether we can expect to see Christina in blue tomorrow? 

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    larysaperih493 avatar
    Larysa Perih
    Larysa Perih
    BoredPanda Staff
    Verified     1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Answer: Daniel is wearing yellow, Emily is in red, Marciano is in green, and Christina is in blue. Christina will wear a blue shirt again tomorrow.

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    #25

    Person holding silver and black revolver A bad guy is playing Russian roulette with a six-shooter revolver. He puts in one bullet, spins the chambers and fires at you, but no bullet comes out. He gives you the choice of whether or not he should spin the chambers again before firing a second time. Should he spin again? 

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    christinabeckley avatar
    K-Hey
    K-Hey
    Community Member
    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Or find a new game to play... Like the knife between the fingers routine...

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    #26

    A joint Father’s Day and graduation party is being thrown for Michael, Ken, James, Alberto, Elias, and Stephanie. Three of them are newly minted high school graduates. The other three are their dads. Stephanie went to the senior prom with Michael’s son. Elias and James played on the school’s baseball team. One of them is Alberto’s son. Michael and Elias are not related. Can you match the high school graduates to their fathers at this joint celebration? 

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    larysaperih493 avatar
    Larysa Perih
    Larysa Perih
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    Verified     1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Answer: Alberto is Elias’ dad, Ken is Stephanie’s dad, and Michael is James’ dad.

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    #27

    Five people were eating apples, A finished before B, but behind C. D finished before E, but behind B. What was the finishing order? 

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    moo-watson2009 avatar
    Mary
    Mary
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    The explanations wrong!!! D FINISHED BEHIND B, NOT BEFORE!!!!

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    #28

    Susan and Lisa decided to play tennis against each other. They bet $1 on each game they played. Susan won three bets and Lisa won $5. How many games did they play? 

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    larysaperih493 avatar
    Larysa Perih
    Larysa Perih
    BoredPanda Staff
    Verified     1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Answer: Eleven. Because Lisa lost three games to Susan, she had lost $3 ($1 per game). So, she had to win back that $3 with three more games, then win another five games to win $5.

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    #29

    There are three crates, one with apples, one with oranges, and one with both apples and oranges mixed. Each crate is closed and labeled with one of three labels: Apples, Oranges, or Apples and Oranges. The label maker broke and labeled all of the crates incorrectly. How could you pick just one fruit from one crate to figure out what’s in each crate? 

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    habastien avatar
    Person
    Person
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    that's not a label maker problem, that's an idiot problem.

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    #30

    Choose your words tiles A teacher writes six words on a board: “cat dog has max dim tag.” She gives three students, Albert, Bernard and Cheryl each a piece of paper with one letter from one of the words. Then she asks, “Albert, do you know the word?” Albert immediately replies yes. She asks, “Bernard, do you know the word?” He thinks for a moment and replies yes. Then she asks Cheryl the same question. She thinks and then replies yes. What is the word? 

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    gossmanwayne avatar
    Wayne Gossman
    Wayne Gossman
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I looked it up. The teacher must tell them that they each have one letter from a chosen word on the list. Which word is it? They must know that the mystery word is on the list, that their letter is from that word and that they each have a different letter.

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    #31

    Ruby and Lewis are expecting… Triplets! They already know what they will name their three children, but they aren’t sharing the names until the babies are born. For now, this is all they’ll say: · All three babies are boys. · Their names are six letters long and anagrams of one another. · Their names include both of their parents’ initials, but none of the other letters in their parents’ first names. What will Ruby and Lewis name their triplets? 

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    #32

    A man has 53 socks in his drawer: 21 identical blue, 15 identical black and 17 identical red. The lights are out and he is completely in the dark. How many socks must he take out to make 100 percent certain he has at least one pair of black socks? 

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    stevec_2 avatar
    Steve C
    Steve C
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    These fools need better sock drawer habits and better electricity, maybe a backup generator or some solar panels and batteries, or at least a flashlight or a mobile phone with a flash on it. Oil lamps or something. I used to love it as a kid when the power would go out and we'd break out the oil lamps and candles.

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    #33

    You have five boxes in a row numbered 1 to 5, in which a cat is hiding. Every night he jumps to an adjacent box, and every morning you have one chance to open a box to find him. How do you win this game of hide and seek? 

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    larysaperih493 avatar
    Larysa Perih
    Larysa Perih
    BoredPanda Staff
    Verified     1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Answer: Check boxes 2, 3, and 4 in order until you find him. Here’s why: He’s either in an odd or even-numbered box. If he’s in an even box (box 2 or 4) and you check box 2 and here’s there, great; if not you know he was in box 4, which means the next night he will move to box 3 or 5. The next morning, check box 3; if he’s not there that means he was in box 5 and so the next night he’ll be in box 4, and you’ve got him. If he was in an odd-numbered box to begin with (1, 3, or 5), though, you might not find him in that first round of checking boxes 2, 3 and 4. But if this is the case, you know that on the fourth night he’ll have to be in an even-numbered box (because he switches every night: odd, even, odd, even), so then you can start the process again as described above. This means if you check boxes 2, 3, and 4 in that order, you will find him within two rounds (one round of 2, 3, 4; followed by another round of 2, 3, 4).

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    #34

    The Reds, the Grays, the Blues, and the Blacks have a round-robin tournament. Each team plays each other team once, for a total of six games. The Blacks won more games than the Blues. The Grays lost more games than the Blues. The Reds tied the Blacks (this was the only tie in the tournament). Who won the game between the Reds and the Blues? 

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    #35

    Dog and cat cuddling At the Pet Show recently I noticed that all except two of the entries were cats, all except two were dogs, and all except two were fish. How many of each animal were at the Pet Show? 

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    #36

    There are three people (Alex, Ben and Cody), one of whom is a knight, one a knave, and one a spy. The knight always tells the truth, the knave always lies, and the spy can either lie or tell the truth. Alex says: "Cody is a knave.” Ben says: "Alex is a knight.” Cody says: "I am the spy.” Who is the knight, who the knave, and who the spy? 

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    #37

    Let’s pretend we’re on the metric system and use kilograms instead of pounds to give us a starting base number of 100. Four people (Alex, Brook, Chris and Dusty) want to cross a river in a boat that can only carry 100kg. Alex weighs 90kg, Brook weighs 80kg, Chris weighs 60kg and Dusty weighs 40kg, and they have 20kg of supplies. How do they get across? 

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    pemdas927 avatar
    pemdas927
    pemdas927
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    But Chris will eat the wolf and the cabbage will eat the black socks.

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    #38

    George, William, John, Abe, and Millard have their birthdays on consecutive days, all between Monday and Friday. George’s birthday is as many days before Millard’s and William’s is after Abe’s. John is two days older than Abe. Millard’s birthday is on Thursday. Can you figure out whose birthday is on each day? 

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    larysaperih493 avatar
    Larysa Perih
    Larysa Perih
    BoredPanda Staff
    Verified     1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Answer: John’s is on Monday, George’s on Tuesday, Abe’s on Wednesday, Millard’s on Thursday, and William’s on Friday.

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    #39

    Suppose there is this little town with a finite numer of people: · No two inhabitants have exactly the same number of hairs. · No inhabitant has exactly 409 hairs. · There are more inhabitants than there are hairs on the head of any inhabitant. So, what is the largest possible number of inhabitants in that little town? 

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    #40

    Marbles in the brown bag There are three bags, each containing two marbles. Bag A contains two white marbles, Bag B contains two black marbles, and Bag C contains one white marble and one black marble. You pick a random bag and take out one marble, which is white. What is the probability that the remaining marble from the same bag is also white? 

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    garymcguire avatar
    Gary McGuire
    Gary McGuire
    Community Member
    2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    The answer for this example above is completely wrong. The probability that the remaining marble from the same bag is also White ? It is NOT 2 out of 3. The TRUE answer is 1 out of 2. IF your first pick was a white marble, you either picked from bag A or bag C. Bag B is off the table, since it never, ever contained a white marble. Therefore, since you picked a white marble first, it had to have come from either A or C. Now, you only have the remaining option of picking another white marble OR a black marble. Therefore, your odds are 1 out of 2, for picking another white marble, out of the same bag.

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