1.
Three spies:
Three spies, suspected as double agents, speak as follows when questioned:
Albert: “Bertie is a mole.”
Bertie: “Cedric is a mole.”
Cedric: “Bertie is lying.”
Assuming that moles lie, other agents tell the truth, and there is just one mole among the three. Who is the mole?
Correct Answer
A. Bertie
Explanation
Based on the statements given, we can deduce that Cedric is telling the truth because if he were the mole, he would be lying. This means that Bertie's statement about Cedric being the mole is false, making Bertie the mole. Therefore, the correct answer is Bertie.
2.
Famous chemist murdered:
A very famous chemist was found murdered in his kitchen today. The police have narrowed it down to six suspects. They know it was a two-man job. Their names: Felice, Maxwell, Archibald, Nicolas, Jordan, and Xavier.
A note was also found with the body: ’26-3-58/28-27-57-16′.
Who are the killers?
Correct Answer
B. Felice
Explanation
The numbers in the note might be a clue to deciphering the names of the culprits.
If you consider the periodic table, where each element is represented by a number, you can correlate these numbers to letters using their positions in the alphabet. For example, 26 represents 'Fe,' which is the chemical symbol for iron. Likewise, 3 represents 'Li' for lithium, 28 is 'Ni' for nickel, and so on.
So, if you translate the numbers in the note to letters according to the periodic table, you get: 'Fe-Li-Ni-Ce,' which can be rearranged to spell "Felice." The other number sequence, '28-27-57-16,' similarly corresponds to 'Ni-Co-La-X,' which can be rearranged to spell "Nicolas."
Therefore, the killers are Felice and Nicolas.
3.
Man killed in his office:
A man got killed in his office. The suspects are Edison, Maxis, Jason, Janna, Sofia, Patrick. A calendar near the man has blood, written 6, 4, 9, 10, 11. Who is the killer?
Correct Answer
A. Jason
Explanation
The answer is Jason because the numbers written in blood on the calendar correspond to the letters in his name. The 6th letter of the alphabet is F, the 4th letter is D, the 9th letter is I, the 10th letter is J, and the 11th letter is K. When you put these letters together, it spells out "FDIJK," which is an anagram of Jason. Therefore, Jason is the killer.
4.
Climbing Trip:A couple went on a climbing trip. But only the husband returned from the vacation and said that his wife slipped off while climbing and died. On investigating, the local sheriff arrested him, saying, "Your travel agent called. You murdered your wife."The man did not inform anyone about the trip. Then how did the agent get so sure that it was a murder?
Correct Answer
B. The man bought only a one-way ticket for his wife whereas he bought a two-way ticket for himself.
Explanation
The travel agent was able to determine that it was a murder because the man bought a one-way ticket for his wife and a two-way ticket for himself. This suggests that the man intended to return from the trip alone, indicating premeditation and suspicion of foul play.
5.
Egg spinning competition:
You are a junior detective investigating a case. Boys at an apartment complain that every day, they have an egg spinning competition with only raw eggs, and every day one particular boy wins.
The boys want you to find out how. You are observing the boy spinning an egg when suddenly it drops to the floor. The apartment clerk casually hands him a broom to clean it up, as if it happens every day. You now know why the boy always wins the daily competition. How?
Correct Answer
B. The clerk handed the boy a broom, so the egg the boy was spinning must have been hard-boiled.
Explanation
The correct answer is that the clerk handed the boy a broom, indicating that the egg the boy was spinning must have been hard-boiled. Since the clerk didn't give the boy a mop to clean up the mess, it suggests that the egg didn't break and make a mess, confirming that it was hard-boiled.
6.
Death in the car:A man was shot to death while in his car. There were no powder marks on his clothing, which indicated that the gunman was outside the car. However, all the windows were up, and the doors locked. After a close inspection was made, the only bullet holes discovered were on the man's body. How was he murdered?
Correct Answer
B. The victim was in a convertible. He was shot when the top was down.
Explanation
The correct answer is that the victim was in a convertible and was shot when the top was down. This explains why there were no powder marks on his clothing and why all the windows were up and the doors locked. The shooter was able to shoot the victim while standing outside the car, taking advantage of the open top.
7.
Sherlock Holmes and the Crimson Brothers: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 running 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?
Correct Answer
C. He should question Mark Crimson.
Explanation
Based on the information provided, Sherlock Holmes should question Mark Crimson. The note left on his door mentions "? Crimson" as the culprit who broke his window. Since the note does not specify a specific brother, Holmes should question all three brothers to gather more information. However, the note does not mention John or Paul specifically, so there is no reason to single them out. Therefore, the correct answer is to question Mark Crimson.
8.
A valuable artifact has been stolen from a museum. The security footage shows three suspects near the scene of the crime. Detective Smith carefully analyzes the footage and notices a unique tattoo on one suspect's wrist, matching the description given by a witness. Another suspect has a history of art theft but claims to have an alibi. The third suspect, a museum employee, was off-duty during the incident. Who should Detective Smith focus the investigation on, based on the available information?
Correct Answer
A. The suspect with the unique tattoo.
Explanation
Based on the available information, Detective Smith should focus the investigation on the suspect with the unique tattoo. The tattoo matches the witness description, making this suspect a primary person of interest. While the suspect with a history of art theft is suspicious, having an alibi raises doubt. The museum employee, being off-duty, is less likely to be involved. Focusing on the suspect with the unique tattoo allows the detective to narrow down the investigation and gather more specific evidence related to this individual's potential involvement in the theft.
9.
A man found dead on Saturday morning:
A man is found dead one Saturday morning. He was killed while his wife was sleeping. The wife tells the police all that she knows. She tells them that the cook was cooking breakfast, the maid was cleaning, and the butler was getting the mail. The police immediately arrest the person who is responsible. Who is responsible and why?
Correct Answer
B. The wife is responsible.
Explanation
The wife is responsible because she claims to know everything that happened, including the activities of the cook, maid, and butler, despite being asleep. This suggests that she is lying and trying to cover up her own involvement in the murder.
10.
Anonymous call:
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?
Correct Answer
A. The fireman's name is John.
Explanation
The answer is that the police immediately arrest the fireman because they are acting on an anonymous phone call. The phone call only provided the suspect's name, which is John, and mentioned that he is inside the house. Since the fireman is the only one in the group of people playing cards who has a name that matches the information given, the police assume that he is the suspect and arrest him. There is no mention of any evidence or further information that would lead them to believe that the fireman specifically stole the money.