There are eight pills. They are all the same size and color. One pill weighs slightly more than the others and it is poisonous. You have a balanced scale and can only use it twice. How can you find the poisoned pill?
Riddle AnswerLogic Riddles
Poisonous Milk Bottle
You are trapped in a room with no food.
After 2 days, you are given 4 bottles of milk out of which one bottle is poisonous.
There is a rat in the room and to find out which bottle is poisonous you can feed milk samples to that rat. But the challenge is that the poison takes effect exactly 10 hours from feeding.
You have only 24 hours in your hand within which you must consume 3 bottles of milk to satisfy your hunger or else you will die.
What strategy would ensure that you drink 3 bottles of milk within 24 hours and survive?
Answer
Feed the rat with milk from one bottle every 1 hour. In this way, if the rat dies after 10 hours, then the first bottle is poisonous.
If the rat does not die after 10 hours, you can drink from milk from the first bottle.
Similarly, if the rat dies after 11 hours, then the second bottle is poisonous, if it dies in 12 hours, the third bottle is poisonous.
However, if the rat doesn’t die even after 12 hours, then the fourth bottle is poisonous and you need not test further.
In this way, you will need a maximum of 12 hours to drink 3 bottles of milk.
Saving Time
Our man Ostap was going home from Kiev. He rode halfway by train – fifteen times as fast as he goes on foot. The second half he went by ox team. He can walk twice as fast as that. Would he have saved time if he had gone all the way on foot? If so, by how much?
Answer
Yes. He took as much time for the second half of his trip as the whole trip would have taken on foot.
So no matter how fast the train was, he lost exactly as much time as he spent on the train. He would have saved 1⁄30 of the time by walking all the way.
15 Minute Intervals
A patient is given five different tablets to take at night at an interval of 15 minutes. How long will it take the patient to consume all the five tablets?
Riddle AnswerWeather Forecast
John was watching television. Just after the midnight news there was a weather forecast: “It is raining now and will rain for the next two days. However, in 72 hours it will be bright and sunny.” “Wrong again,” snorted John. He was correct but how did he know?
Riddle Answer