Power Outage Riddle
Julie is going on an extended trip for three weeks. She lives in a remote area where there are frequent electrical power outages which can last up to three or four days. Julie has quite a bit of food in her freezer which would go bad if it thawed and then re-froze. She does have digital clock and a VCR which would flash 12:00 if the power went out. Unfortunately the clock and VCR flash even if the power only goes out for a few seconds. What can Julie do so that when she returns home she will be able to determine whether the power was out long enough to thaw her food? Asking a neighbor whether the power was out, isn't a reliable option because the nearest house is half a mile away, and one house may have power, while another house may have no power. She won't be able to have a neighbor check on her house every day, and has no one to house sit.
Hint:
One thing Julie could do is freeze a tray of ice-cubes, and turn the tray of ice upside down in her freezer. When she comes home, she should check the tray. If the ice cubes are still in the tray, the food is safe to eat. If the trays are empty, it's time to clean out the freezer. She will have to make a judgment call if the ice-cubes are only slightly thawed. Did you answer this riddle correctly?
YES NO
YES NO
Lost Minute Riddle
Hint:
The one that doesn't work is best as it will always be correct twice a day, but the one that loses a minute a day will not be correct again for 720 days (losing 720 minutes or 12 hours). Did you answer this riddle correctly?
YES NO
YES NO
Clock Out The Window
Hint:
Chances Of A 2nd Girl Riddle
Tipli and Pikli are a married couple (dont ask me who he is and who she is)
They have two children, one of the child is a boy. Assume safely that the probability of each gender is 1/2.
What is the probability that the other child is also a boy?
They have two children, one of the child is a boy. Assume safely that the probability of each gender is 1/2.
What is the probability that the other child is also a boy?
Hint: It is not 1/2 as you would first think.
1/3
This is a famous question in understanding conditional probability, which simply means that given some information you might be able to get a better estimate.
The following are possible combinations of two children that form a sample space in any earthly family:
Boy - Girl
Girl - Boy
Boy - Boy
Girl - Girl
Since we know one of the children is a boy, we will drop the girl-girl possibility from the sample space.
This leaves only three possibilities, one of which is two boys. Hence the probability is 1/3 Did you answer this riddle correctly?
YES NO
This is a famous question in understanding conditional probability, which simply means that given some information you might be able to get a better estimate.
The following are possible combinations of two children that form a sample space in any earthly family:
Boy - Girl
Girl - Boy
Boy - Boy
Girl - Girl
Since we know one of the children is a boy, we will drop the girl-girl possibility from the sample space.
This leaves only three possibilities, one of which is two boys. Hence the probability is 1/3 Did you answer this riddle correctly?
YES NO
An Old Relative Riddle
Hint:
Five Apples Riddle
There were five women sitting in a room. In the same room there was a basket with five apples in it. Each woman took an apple, but one apple still remained in the basket. How could this be?
Hint:
The fifth woman took the entire basket, with the apple still in it. Did you answer this riddle correctly?
YES NO
YES NO
The Red Hat
Once upon a time there lived a king who wished to find the wisest man in the realm to be his assistant. He summons the 3 known wisest men to his court and he administers the following test.
He sits them in a circle, facing each other and he says Im going to put either a red hat or a white hat on each of your heads. He proceeds to place a red hat on each of their heads. Obviously they can see each other but there are no mirrors in the room so they cant see whats on their heads. He says If you can see a red hat, raise your hand. They all raise their hands. Then he says If you can tell what color hat you have on, stand up.
Time goes on, one guy looks at another guy, he looks at the other guy. The other guy looks at him. Finally one guy stands up. The question is how did he know he was wearing a red hat?
He sits them in a circle, facing each other and he says Im going to put either a red hat or a white hat on each of your heads. He proceeds to place a red hat on each of their heads. Obviously they can see each other but there are no mirrors in the room so they cant see whats on their heads. He says If you can see a red hat, raise your hand. They all raise their hands. Then he says If you can tell what color hat you have on, stand up.
Time goes on, one guy looks at another guy, he looks at the other guy. The other guy looks at him. Finally one guy stands up. The question is how did he know he was wearing a red hat?
Hint: For a moment or two, nobody moved. Nobody knew for certain what color his hat was, and thats what told the wisest guy that all of the hats were red.
Step 1:
Wiseguy #1 knows he can see two red hats.
Step 2:
Wiseguy #1 thinks, "Hey, if I were wearing a white hat, Wiseguy #2 would see one red hat and one white."
Step 3:
Wiseguy #1 then thinks, "If I were wearing a white hat, and Wiseguy #2 saw one red hat and one white (and if he were wearing a white hat himself), then Wiseguy #3 would have seen two white hats. So, Wiseguy #3 wouldnt have raised his hand to the first question.
Wiseguy #1 thinks, "If that were true, Wiseguy #2 would be sure that he had a red hat. But since Wiseguy #2 was actually unsure about his hat color, it can only mean one thing, my hat is red." Did you answer this riddle correctly?
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Wiseguy #1 knows he can see two red hats.
Step 2:
Wiseguy #1 thinks, "Hey, if I were wearing a white hat, Wiseguy #2 would see one red hat and one white."
Step 3:
Wiseguy #1 then thinks, "If I were wearing a white hat, and Wiseguy #2 saw one red hat and one white (and if he were wearing a white hat himself), then Wiseguy #3 would have seen two white hats. So, Wiseguy #3 wouldnt have raised his hand to the first question.
Wiseguy #1 thinks, "If that were true, Wiseguy #2 would be sure that he had a red hat. But since Wiseguy #2 was actually unsure about his hat color, it can only mean one thing, my hat is red." Did you answer this riddle correctly?
YES NO
A Man Rode Into Town
A man rode into a town with his horse on the 25th of June. He stayed in the town for 3 weeks, then left on June. How is this possible?
Hint:
Colorful House Riddle
You can see a beautiful red house on your left and a mesmeric green house on your right, a warming and attractive pink house on your front. Then where is the white house?
Hint:
Head In The Clouds Riddle
Head in the clouds but my feet on the earth
Glowing with fire, people kept a wide berth
Place full of stones, a bush and a rock
(Somewhere to hide, away from the shock)
I must not be touched and of heaven am token
I thundered loud when the tablets were broken
I am in the Bible - what am I?
Glowing with fire, people kept a wide berth
Place full of stones, a bush and a rock
(Somewhere to hide, away from the shock)
I must not be touched and of heaven am token
I thundered loud when the tablets were broken
I am in the Bible - what am I?
Hint:
Albatross Boat Riddle
Two men walk into a restaurant by the sea and sit at the bar. Both men are covered in water. Both men order a plate of Albatross and take one bite. After chewing and swallowing, the first man stands up, walks outside, and shoots himself, while the other finishes his meal.
Hint:
The two men were stranded out in the ocean with a third man when they were beginning to stave. When an albatross landed on their life boat and died they finally had food but it was not enough to feed all three of them. They drew straws and the looser was killed and eaten. They mixed up the human meat and the albatross meat so neither person would know what they were eating. After being rescued, the friends went to eat real Albatross and the man who killed himself realized that he was the one that ate his friend. Did you answer this riddle correctly?
YES NO
YES NO
Twinkle And Rinki Cross A River
Twinkle and Rinki wish to cross a river.
The only way to get to the other side of the river is by boat, but that boat can only take one of them at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both girls manage to cross using the boat.
How?
The only way to get to the other side of the river is by boat, but that boat can only take one of them at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both girls manage to cross using the boat.
How?
Hint:
Soldiers Across A River
A detachment of soldiers must cross a river. The bridge is broken, the river is deep. What to do?
Suddenly the officer in charge spots two boys playing in a row boat by the shore.
The boat is so tiny however, that is could only hold two boys or one soldier.
Still all the soldiers make it across the river in the boat. How?
Suddenly the officer in charge spots two boys playing in a row boat by the shore.
The boat is so tiny however, that is could only hold two boys or one soldier.
Still all the soldiers make it across the river in the boat. How?
Hint:
First the boys cross the river and 1 boy comes back and gets a soldier and keeps going back until all the soldiers have made it across safely. Did you answer this riddle correctly?
YES NO
YES NO
Surprise Birthday Party Riddle
David is throwing Robert a surprise birthday party but he has to stay within his budget. He spent half of his money plus $2.00 on the cake. Half of what he had left plus $2.00 was spent on balloons and streamers. Then he spent half of what he had left plus $1.00 on candy. Now he is out of money, how much did he start with?
Hint:
This one is best solved working backwards, the last part David spent half of what was left plus $1.00 on candy and then was out of money. That means he must have spent $2.00 on Candy as $1.00 was half of what he had using the same logic backwards: $2.00 on candy $6.00 on Balloons and Streamers $12.00 on the cake Total of $20.00. Did you answer this riddle correctly?
YES NO
YES NO
Four Bottles Of Wine Riddle
There are four girls, and four bottles of wine in a picnic basket. Every girl takes a bottle, yet one bottle remains in the basket? How is this possible?
Hint:
The answer is that one girl took the picnic basket. She took the last bottle of wine while it was in the basket. Did you answer this riddle correctly?
YES NO
YES NO
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