Question: You have been poisoned by an evil scientist. He told you that the only antidote is the saliva of a gecko. He contains saliva of six different animals. A gecko, a lizard, a koala, a tapir, a giraffe, and a cow. He hasn’t labeled he test tubes containing the saliva f the animals. On the left is a table which four of the test tubes are one. On the right is a table which two of the test tubes are on. The lizards saliva is poisonous. The lizard and gecko test tubes are on the same table. The test tubes on the left are labelled 1, 2, 3, and 4. The gecko spit will not override the lizard poison. The lizard and gecko saliva are not right beside each other. You don't know where the cow test tube is. You know that the cow saliva is in 2 or 3 however. You know that the lizard test tube is not to the right of the cow. You only have time to drink two test tubes, which side do you run toward and which test tubes do you drink?
Answer: You go to the left side and drink 4 and 3. You don't go to the right because there are only two test tubes on the right, and the lizard poison overrides the antidote to the other poison. The cow is in 2, which means that the lizard is in either 1 or 4, if the cow is 2 that means that the gecko is in 1, 2, or 3. We have deducted that the lizard is 1 or 4, lizard and gecko can't be beside each other and we know that the cow is in 2, which makes it impossible for the lizard saliva to be 3 or 4. Using that we can conclude the lizard is in 1. We use three and four because the gecko, through deduction, is in 3 or 4.
Question: I only come out when I see lights My colour is opposite of white Mostly, you don’t realize that I’m with you If you leave me, I’ll keep follow you I’ll always copy whatever you do You can’t touch me and I can’t touch you What am I?
Question: There is a prison with 100 prisoners, each in separate cells with no form of contact. There is an area in the prison with a single light bulb in it. Each day, the warden picks one of the prisoners at random, even if they have been picked before, and takes them out to the lobby. The prisoner will have the choice to flip the switch if they want. The light bulb starts off.
When a prisoner is taken into the area with the light bulb, he can also say "Every prisoner has been brought to the light bulb." If this is true all prisoners will go free. However, if a prisoner chooses to say this and it's wrong, all the prisoners will be executed. So a prisoner should only say this if he knows it is true for sure.
Before the first day of this process begins, all the prisoners are allowed to get together to discuss a strategy to eventually save themselves.
What strategy could they use to ensure they will go free?
Answer: Only allow one prisoner to turn the light bulb off and all of the others turn it on if they have never turned it on before. If they have turned it on before they do nothing. The prisoner that can turn it off then knows they have all been there and saves them all when he has turned it off 99 times.
Question: Two spies want to get in an enemy's military base. In order to get in they have to give the correct countersign to the guard at the gate after he gives them the sign. So, they wait hidden nearby the gate so that they will overhear the countersign from another soldier. One soldier comes and the guard gives the sign: "6". The soldier answers "3". The guard lets him pass. Another soldier comes. The guard says "12" and the soldier gives the answer "6". The guard lets him pass. So, the first spy goes at the gate and the guard says "10".The spy, sure that he knew the answer as he was, says "5". Immediately, the guard shoots him dead. Then the other spy, who saw that the other spy was killed when he gave the countersign, had now understood what the right answer would be, whatever the guard's sign was.So, he walks to the gate and the guard says "8".The spy gives the correct answer and the guard lets him in. What was the answer that the spy gave?
Answer: 5. It's the number of letters it takes to spell the word the guard says.
Question: There is a kingdom and in the kingdom when you drink a poison the only way to cure yourself is to drink a stronger poison to neutralize it. The King wants to make the strongest poison possible in order to make sure he can neutralize any other poison he may be given. To do this he enlists the two best chemists of the land: Tom and Bob.
The king is going to have them both create a poison as strong as they can then have them drink the other person's poison then their own. Whoever dies created the weaker poison. Tom knows that Bob is much better at making poisons and he is sure to make a stronger poison. Knowing this, Tom makes a plan that ensures he lives and Bob dies.
The day of the contest arrives and Bob realizes that Tom must have known he had no chance against his prowess as a poison maker. So Bob thinks quickly and creates a new plan that ensures that once again he will live and Tom will die.
In the end Bob lives, Tom dies, and the King doesn't get what he wants.
Answer: After Tom realized he was going to lose he finds that the only way to live is to replace his poison with something that isn't poison at all and drink a poison of his own before the contest. In this way he drinks his own weaker poison then neutralizes it with Bob's stronger poison. Last he drinks the non-poison he submitted to the contest.
Once Bob realizes that this is the only way Tom can save himself he figures out that he can save himself by either drinking a weaker poison before the contest so his neutralizes it in the contest or submit a non-poison to the contest as well. If he drinks a weaker poison before the contest both Tom and Bob will live and the King will realize that they are disobeying his orders which probably won't turn out well. But by submitting a non-poison to the contest as well Tom will end up drinking the weaker poison before the contest and the two non-poisons in the contest and he will still die, and the King will be none the wiser (although he will not get what he wants being that both of the poisons actually aren't poisons at all).
Follow us and get the Riddle of the Day, Joke of the Day, and interesting updates.