Logic Puzzles
Riddle: Mr. Green, Mr. Brown, and Mr. Black meet up for coffee one Monday morning. Mr. Green says, "Hey, do you realize that we're all wearing shirts of colors that don't match our names?". The man wearing the brown shirt says, "Wow, Mr. Green, you're right"! What colored shirt is each man wearing?
Answer: Mr. Green cannot be wearing the green shirt, because his statement that all three men are wearing shirts that don't match their names is correct. And he cannot be wearing the brown shirt, because the man wearing the brown shirt replied to his words, and let's be honest–it doesn't make sense to reply to your OWN words, right? This means Mr. Green can only be wearing the black shirt. Mr. Brown can either be wearing a green or a black shirt. The black shirt is already taken, so Mr. Brown is wearing the green shirt. And Mr. Black is wearing the brown shirt.
Riddle: Tom walks into a room and see three monkeys. One monkey holds a banana, another monkey holds a stick, and the last monkey holds nothing. Who is the smartest primate in the room?
Answer: Assuming that Tom is a human, then he is the smartest primate in the room because humans are also primates.
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: You have two coins, and their total value is 11¢. One of the coins is not a penny. What are the two coins?
Answer: The two coins are a dime and a penny. I said "ONE of the coins is not a penny"; if one of the coins is not a penny, then the other coin IS a penny. The coin that is not a penny has to be a dime because the total value should be 11¢.
Riddle: There are two rooms in front of you. On the door to each room, there is a sign; only one of the signs tells the truth. The sign on the door to the first room says, "There is treasure here. A monster lurks in the other room,". And the sign on the door to the second room says, "The treasure and the monster are in different rooms,". Where is the treasure?
Answer: The treasure is in the second room. If the first sign is true, then the second sign is true, too. This contradicts the terms of the game. Therefore, the first sign is false, and the second sign is truthful.
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: 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: 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: 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: A football player is running to get a net under a lady who looks like she might jump off the balcony of her 20 story apartment building. There is nothing below her except a 20 story fall. The player is still 100 yards away when she falls and can't nearly get there in time. The woman is not hurt more than a bruise. How is that possible?
Answer: She fell back into her apartment!
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: Wendy and Maverick are participating in a mathematical game show. Their scores are tied, so whoever gets the last riddle correct wins. The riddle goes like this: I am thinking of a number. It is a five-digit whole number. It can be read the same way forwards, backwards, and upside-down. The second digit is half of the third. The last digit is the product of the first and last digits. And the sum of all five digits is 10. What number am I thinking of? Wendy says, "12,421". Maverick says, "10,801". Who is correct?
Answer: Maverick is correct. The number is 10,801. This is why: Both numbers meet most of the requirements, but 12421 does not meet the second requirement because it CANNOT be read the same way upside-down as right-side-up. Many think 10801 does not meet the third requirement, but 0 CAN be half of 8 if you cut 8 in half horizontally. This way, you will get two zeros, and 10801 DOES meet the third requirement. Since only 10801 meets all the requirements, it is the correct answer, and Maverick is right!