Anderson, Biggs, and Carpenter were staying together at a place by the seaside. One day they went out in a boat and were a mile at sea when a rifle was fired on shore in their direction. It seems that Anderson only heard the report of the gun, Biggs only saw the smoke, and Carpenter merely saw the bullet strike the water near them. Which of them first knew of the discharge of the rifle?

Acting on an anonymous phone call, the police raid a house to arrest a suspected murderer. They don’t know what he looks like but they know his name is John and that he is inside the house. The police bust in on a carpenter, a lorry driver, a mechanic and a fireman playing cards. Without hesitation or communication of any kind, they immediately arrest the fireman. How do they know they’ve got their man?

A man was found dead in his study. He was slumped over his desk and a gun was in his hand. There was a cassette recorder on his desk. When the police entered the room and pressed the play button on the tape recorder they heard: “I can’t go on. I have nothing to live for.” Then there was the sound of a gunshot. How did the detective immediately know that the man had been murdered and it wasn’t a suicide?

A man murders his wife with a knife in their car. Nobody is around to see this. He throws her out of the car being careful not to leave any fingerprints on her body. Next he throws the knife off of a cliff into a valley where it will never be found and he goes home. An hour later the police call him and tell him that his wife has been murdered and he needs to come to the scene of the crime immediately. As soon as he arrives, he is arrested. How did they know he did it?

The Smith family is a very wealthy family that lives in a big, circular home. One morning, Mr. Smith woke up and saw a strawberry jam stain on his new carpet. He figured out that everyone who was there that morning had a jam sandwich. From the following statements, figure out who spilled the jam. Billy Smith: “I was outside playing basketball.” The Maid: “I was dusting the corners of the house.” Chef: “I was starting to make lunch for later.” Who is lying?

At the scene of a heinous crime, five suspects, one of whom is the guilty party, are being interrogated by a detective. Each of the suspects gives one statement and it later transpires that just three of these statements are correct. These are the statements: Uncle Jack: Uncle Jim committed the murder Aunt Mary: I did not do it Cousin Stewart: It was not Cousin Margaret Uncle Jim: Uncle Jack is lying when he says I did it Cousin Margaret: Aunt Mary is telling the truth Who committed the murder?

One snowy night, Sherlock Holmes was in his house sitting by a fire. All of a sudden a snowball came crashing through his window, breaking it. Holmes got up and looked out the window just in time to see three neighborhood kids who were brothers run around a corner. Their names were John Crimson, Mark Crimson and Paul Crimson. The next day Holmes got a note on his door that read “? Crimson. He broke your window.” Which of the three Crimson brothers should Sherlock Holmes question about the incident?

A man was killed in his office. At the time of murder there were only four people in the office: Bill, Tom, Harry and Mike. When police interrogated them, they gave the following statements. Bill: “Tom did it.” Tom: “Bill did it.” Harry: “Tom’s telling the truth.” Mike: “Harry’s not lying.” After analysis, the police found out that only one person was telling the truth and the rest were lying. Can you analyse the statements and determine the killer?

Melissa, Jessica, Sandy and Nicole were working on the computer. Suddenly, I heard a crash and then lots of shouts. I rushed in to find out what was going on, finding the computer monitor on the ground, surrounded with broken glass! Sandy and Jessica spoke almost at the same time: Jessica said, “It wasn’t me!” Sandy said, “It was Nicole!” Melissa said, “No, it was Sandy!” Nicole said, “Sandy’s a liar.” Only one of them was telling the truth, so who broke the monitor?

An old man lives alone in a flat. Because of his old age, he is not able to move comfortably and hence most of the things are delivered to his home. On Friday while delivering the mail, the postman felt something suspicious in the flat and tried to look inside through the key hole and he saw a blood filled body of the old man. The police arrived at the scene. On the outside of flat they found two bottles of warm milk, Tuesday newspaper, some unopened mails and some gifts. Who killed the old man and how did the police know who to arrest?

A man placed a $100 dollar bill on his desk and left for work. When he returned back the money was gone. He has three suspects: the cook, the maid and the electrician. The cook said he put the bill under a book on his desk to keep it safe. The man checked and it is no longer there. The maid said she moved the bill to the inside of the book between page 1 and 2 while she was cleaning. Again, the man checked the book and there was nothing between page 1 and 2. The electrician said he saw the bill sticking out of the book and he moved it between page 2 and 3 to keep it safe. Who stole the money?

Ben was found dead in his study by Peter. Peter recounted his dismal discovery to the police. “I was walking by Ben’s house when I thought I would just pop in for a visit. I noticed his study light was on and I decided to peek in from the outside to see if he was in there. There was frost on the window, so I had to wipe it away to see inside. That is when I saw his body. So I kicked in the front door to confirm my suspicions of foul play. I called the police immediately afterward.” The officer immediately arrested Peter for the murder of Ben. How did the officer know that Peter was lying?

A man is in court for killing his wife. In the closing statements the man’s lawyer surprises everyone when he announces “His wife was just missing. Everyone look at those doors. His wife is going to walk in those doors in about 30 seconds.” The entire court is silent and the jury stares at the door as the lawyer and the defendant stare at them. After a couple of minutes the lawyer says “See! If you were so sure he killed his wife, you wouldn’t be watching that door!” The jury goes into deliberation and comes back almost immediately with a guilty verdict. Why did the jury convict him?

A grandfather is telling his grandson war stories. “At the end of World War 1, I was awarded for my bravery after saving a group of my men,” the grandfather says. “You see, we were fighting in northern France and one of our enemies threw a grenade at us. I managed to pick it up and throw it away before it exploded. So right after the war ended, a General gave me a sword, engraved with the words ‘Awarded for Bravery and Valor, A True Hero, World War 1′.” The grandson thinks about the story for a minute and then says “Grandpa, that story can’t be true!” How did the grandson know?

One evening there was a murder in the home of married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime. The other one helped the murderer. These are the things we know for sure: The witness and the one who helped the murderer were not of the same sex. The oldest person and the witness were not of the same sex. The youngest person and the victim were not of the same sex. The one who helped the murderer was older than the victim. The father was the oldest member of the family. The murderer was not the youngest member of the family. Who was the murderer?