Logic Puzzles
Riddle: Someone's grandfather was born in 50 BCE. How old was this man in 25 CE?
Answer: This man was 74 years old. There was no year 0; after 1 BCE, there was 1 CE.
Riddle: There are 10 fish in my fish tank. Suddenly, two of them drown, three of them swim away, and four of them die. How many fish are left in the tank?
Answer: There are still 10 fish left. For one thing, fish can't drown. Plus, none of the fish could have swam away because they're still in the tank.
Riddle: A green apple costs $1, a red apple costs $2, and a blue apple costs $3. If you have $3, but only two bills, what apples can you buy?
Answer: There are two solutions; you can either buy one green apple and one red apple using a $1 and a $2 (yes, $2 bills are a thing), or you can buy three green apples using the same two bills. You could have bought one blue apple using those bills, but blue apples don't exist!
Riddle:
Answer: https://www.facebook.com/riddlesdotcom/posts/pfbid0buwHpkfj8LjRQK6g1C8kzPSkfZyXu2KzFkPiiJr17xW8xDf1VwWxVrKPxiysrmBjl
Riddle: I am the owner of a pet store. If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?
Answer: I have 3 cages and 4 canaries
Riddle: I saw a dead cow walking on the street. How is this possible?
Answer: Simple. The person was walking down the street when the saw the dead cow.
Riddle: With thieves I consort, With the vilest, in short, I'm quite at ease in depravity; Yet all divines use me, And savants can't lose me, For I am the center of gravity. Who am I?
Answer: The letter V.
Riddle: Can you drop a full glass and spill no water?
Answer: Yes, if the glass is full of milk (or anything else but water).
Riddle: A rotating fragment of mineral collects no byrophytic plants. What is the proverb?
Answer: A rolling stone gathers no moss.
Riddle: Exercise your visual faculties prior to executing a jump. What is the proverb?
Answer: Look before you leap.
Riddle: An excess of individuals skilled in the preparation of edibles impairs the quality of this soup. What is the proverb?
Answer: Too many cooks spoil the broth.
Riddle: A feathered Biped in the terminal part of the arm equals in value a pair of feathered bipeds in densely branched shrubbery. What is the proverb?
Answer:  A bird in the hand is worth two in the bush.
Riddle: Does Brittain have a 4th of July?
Answer: Yes, it also have July 1, 2, 3, 5 and so on.
Riddle: Claudia invented a game for her friends to play at her birthday party. Here is how it goes: she will place two marbles into a box– one yellow marble, and one purple marble. The player will have to pull out one of the marbles from the box. If the marble is yellow, the player will win $100.00, but if the marble is purple, the player will have to pay $10.00. Claudia decided to trick the players by putting two purple marbles into the box, rather than one yellow and one purple. Brian watched the other players lose the game one by one. But when it was his turn, he won $100.00! How did he do it?
Answer: Brian pulled out one of the marbles, and, without showing it to anyone, quickly put it in his mouth, being careful not to swallow it. Then, he pulled out the remaining marble, which was purple, and showed it to everybody. According to the rules, it meant that the marble Brian had chosen was yellow. Claudia had to admit it, otherwise, everyone at the party would know that she was a liar.
Riddle: Cooper wakes up in a room and sees three piles of shattered glass; each pile contains a few shards of glass with letters on them. His task is to rearrange the piles of glass into words and find out which word doesn't belong. Can you unscramble these words and help Cooper out? CBNAO | PCEUCKA | VLEO
Answer: The three words are BACON, CUPCAKE, and LOVE. This riddle is open to many interpretations, so there are multiple answers. For example, BACON doesn't end with an E (unlike CUPCAKE and LOVE). However, CUPCAKE has three vowels (while BACON and LOVE have two each). On the other hand, LOVE is an emotion (while BACON and CUPCAKE are foods). No matter which word you pick, there is at least one reason for it being correct.
Riddle: There are four cards in front of you. You don't know the suits, but that's not important. Assume that all of the following statements are true: 1) There are no ace cards. 2) The difference between the third card and the first card is 8. 3) The difference between the fourth card and the second card is 7. 4) There are no face cards. 5) The card on the left cannot be greater than the card on the right. What are the four cards?
Answer: The card on the far left is a 2, the card next to it is a 3, then there is a 10, and there is a 10 next to the first 10 card. Hey, I didn't say there couldn't be any cards of the SAME value!
Riddle: There are five doors in front of you in the following order: black, blue, black, black, blue. Only one door will lead you to freedom, and you only have one chance to pick it. Assuming that all three hints are true, can you pick the correct door? 1) The correct door is black. 2) The correct door is not next to the leftmost or the rightmost door. 3) The correct door is not in the middle.
Answer: The leftmost door is the correct door. There are only three black doors, so it's one of them (we can eliminate doors two and five because they are blue and not black). The fourth door should be eliminated next because it's next to the rightmost door, which contradicts the second hint (we can't eliminate the first door because it's not correct to say that the leftmost door is next to itself). And the middle door is a trap, too. Therefore, the first door is the best choice.
Riddle: You are driving a car. On your right, there is a steep cliff. Right in front of you, there is a horse and right behind you, there is an elephant, both of which travel at your own speed. On your left, there is a fire truck blocking you. How do you stop your car?
Answer: Just ask the merry-go-round operator to stop!
Riddle: A pig lives on a pig farm, a cow lives on a cow farm, a sheep lives on a sheep farm, and a chicken lives on a chicken farm. Where do horses live?
Answer: On a ranch.
Riddle: Ira, run, go get it. What is the anagrammed word?
Answer: Regurgitation.