10 Boxes Riddle
There are ten boxes containing some balls. Each of the ball weighs exactly 10 grams. One of those boxes have defective balls (all the defective balls weigh 9 grams each).
An electronic weighing machine is provided to you and you are allowed only one chance of weighing on it.
How will you find out which box has defective balls ?
An electronic weighing machine is provided to you and you are allowed only one chance of weighing on it.
How will you find out which box has defective balls ?
Hint:
Let us simplify boxes by naming them from 1 to 10.
Now the trick here is to pick different number of balls from different boxes. So to simplify things, we will pick balls corresponding to box number.
Thus, pick 1 ball from Box 1, 2 balls from box 2, 3 balls from box 3 and so on. You will have 55 balls altogether. Now, put them all in the balance.
If all balls were weighing accurate 10 grams, the total weight of the 55 balls would have been 550 grams. But one of the box must have had the defective balls.
Suppose if the defective balls were in box number 2, then the total weight will be 2 grams less than 550. If the defective balls were in box 8, the total weight will be less than 8 grams from 550. In this way, you will be able to identify which box has the defective balls. Did you answer this riddle correctly?
YES NO
Now the trick here is to pick different number of balls from different boxes. So to simplify things, we will pick balls corresponding to box number.
Thus, pick 1 ball from Box 1, 2 balls from box 2, 3 balls from box 3 and so on. You will have 55 balls altogether. Now, put them all in the balance.
If all balls were weighing accurate 10 grams, the total weight of the 55 balls would have been 550 grams. But one of the box must have had the defective balls.
Suppose if the defective balls were in box number 2, then the total weight will be 2 grams less than 550. If the defective balls were in box 8, the total weight will be less than 8 grams from 550. In this way, you will be able to identify which box has the defective balls. Did you answer this riddle correctly?
YES NO
Superhero Space Host Riddle
Hint:
The German Spy Riddle
However the manager was suspicious and decided to test him with a question before he trusted him. So he asked, what would you be sure to find in the middle of Toronto?
The spy thought fast and came up with an answer for the manager.
What did he say?
Hint:
Threw Away The Outside Food Riddle
First I threw away the outside and cooked the inside, then I ate the outside and threw away the inside, what did I eat?
Hint: It's a vegetable
The Mouth That Never Eats
I always run but never walk. I often murmur but never talk. I have a bed but don't sleep, and I have a mouth but never eat. What am I?
Hint:
Something You Might Eat Riddle
Im something you might eat, but I also kill.
I can cause blindness and burns.
Because of me, people lose limbs.
Ive even been known to crash cars.
And yet Im considered beautiful
Small children play with me and parents dont mind.
Some people even live inside of me.
What am I?
I can cause blindness and burns.
Because of me, people lose limbs.
Ive even been known to crash cars.
And yet Im considered beautiful
Small children play with me and parents dont mind.
Some people even live inside of me.
What am I?
Hint:
The King And The Kingdom Riddle
Once there lived a king who did not allow anybody to leave the kingdom and any foreigners in his kingdom. There was only one bridge that connected his empire with the outer world. A guard who was a sharpshooter was specially assigned for a lookout on the bridge. According to the orders, anyone moving outside should be killed and anyone coming to his kingdom should be sent back. To take rest, the guard used to sit inside his hut for 5 minutes and return back on the lookout. The bridge took a minimum of 8 minutes to pass.
Even then, a woman was able to escape the kingdom without incurring any kind of harm to the guard.
How ?
Even then, a woman was able to escape the kingdom without incurring any kind of harm to the guard.
How ?
Hint:
The woman started walking across the bridge when the guard was inside the hut. She walked all the time he was inside (5 minutes) and then turned and moved back towards the kingdom. On approaching the kingdom he was asked for papers and since she did not have any, she was sent back. Did you answer this riddle correctly?
YES NO
YES NO
Two Companions Riddle
Garry Knows that his friend is lying? How ?
Hint:
The Locked Cemetery Riddle
Hint:
A Boy At The Carnival
A young boy was at the carnival. He was walking past a kiosk where an old man was sitting.
"Do you want to play a game?" the old man said to him.The young boy was intrigued. "What kind of game?" he asked.
"It's a very simple game." said the old man. "I will tell you the rules. I have ten large metal boxes. Inside one of the boxes is the prize money. One thousand dollars."
"A thousand bucks, huh?" asked the boy. "What's the catch?"
"The boxes are sturdy and strong," said the old man. "Much too strong to be opened with your bare hands. They are also airtight and cannot be damaged by a hammer, an axe or even a chainsaw."
"So they're impossible to open?" said the boy.
"Not impossible." said the man. "I have a blowtorch which can be used to open the boxes."
"Is there a time limit?" asked the boy.
"You can take as much time as you want." said the old man. "When you find the prize money, it's all yours. So, do you want to play the game?"
"Well, I don't how I could possibly lose," said the boy. "OK. I'll play your game."
The old man smiled. "I'll make it very easy for you", he said. "There are ten metal boxes, but if you give me five dollars, I will start you right next to the prize money."
The boy happily took out his wallet and handed a crisp five dollar note to the old man. There was a mischievous grin on the old man's face.The game started.The prize money was right in front of the boy. He could see it. He could touch it.Even though he won the game, the boy was never able to spend the money. He died shortly after he won the game.
How did the boy die?
"Do you want to play a game?" the old man said to him.The young boy was intrigued. "What kind of game?" he asked.
"It's a very simple game." said the old man. "I will tell you the rules. I have ten large metal boxes. Inside one of the boxes is the prize money. One thousand dollars."
"A thousand bucks, huh?" asked the boy. "What's the catch?"
"The boxes are sturdy and strong," said the old man. "Much too strong to be opened with your bare hands. They are also airtight and cannot be damaged by a hammer, an axe or even a chainsaw."
"So they're impossible to open?" said the boy.
"Not impossible." said the man. "I have a blowtorch which can be used to open the boxes."
"Is there a time limit?" asked the boy.
"You can take as much time as you want." said the old man. "When you find the prize money, it's all yours. So, do you want to play the game?"
"Well, I don't how I could possibly lose," said the boy. "OK. I'll play your game."
The old man smiled. "I'll make it very easy for you", he said. "There are ten metal boxes, but if you give me five dollars, I will start you right next to the prize money."
The boy happily took out his wallet and handed a crisp five dollar note to the old man. There was a mischievous grin on the old man's face.The game started.The prize money was right in front of the boy. He could see it. He could touch it.Even though he won the game, the boy was never able to spend the money. He died shortly after he won the game.
How did the boy die?
Hint:
The man put the inside of the box since he said for five dollars, he'd put the boy next to the money. Since the box was airtight, he suffocated Did you answer this riddle correctly?
YES NO
YES NO
Out The Abandoned Building Riddle
A homicide detective is called at a crime scene. A man is lying dead in front of an abandoned building. It is believed that the man jumped out of a window off the abandoned building and committed suicide.
The detective asks his team to collect evidence and he heads towards the building. He goes to the first floor and towards the room that is on the front side. Inside the room, he lights a cigarette, walks towards the window facing the dead body, opens the window and throws out the cigarette. He then goes to the second floor and repeats the same process.
He keeps doing the same thing till he is done with all the floors and then takes the lift to the ground floor. Upon reaching there, he informs the team that it is not a suicide but a murder.
How did he know that it was a not a suicide?
The detective asks his team to collect evidence and he heads towards the building. He goes to the first floor and towards the room that is on the front side. Inside the room, he lights a cigarette, walks towards the window facing the dead body, opens the window and throws out the cigarette. He then goes to the second floor and repeats the same process.
He keeps doing the same thing till he is done with all the floors and then takes the lift to the ground floor. Upon reaching there, he informs the team that it is not a suicide but a murder.
How did he know that it was a not a suicide?
Hint:
If the man had committed suicide, the window that he jumped from should have been left opened. But all the windows facing the dead body were closed. This means that someone closed the window after the man died. Did you answer this riddle correctly?
YES NO
YES NO
Peter's Proposal Riddle
A couple - Peter Parker and Mary Jane are madly in love with each other, but they live miles apart. Peter wants to send a gold ring to Mary to celebrate their first anniversary together but in a country where people steal anything unlocked, he can't send it to her without locking it inside a box.
Now, Peter and Mary have a lot of padlocks with them, but they don't have the key to the padlock for one another's.
How will Peter send the ring now?
Now, Peter and Mary have a lot of padlocks with them, but they don't have the key to the padlock for one another's.
How will Peter send the ring now?
Hint:
Peter will have to use a lock box that can hold two locks. He will put the ring in a box and will mail it to Mary. Upon receiving the box, Mary will put her own lock box inside and will send back to Peter. Peter can then-then take off his lock and send it off to Mary again. Did you answer this riddle correctly?
YES NO
YES NO
A Cabin On A Mountain Riddle
There are 27 people in a cabin on a mountain. The windows and doors are all locked, but everyone inside is dead. What happened?
Hint:
The cabin is an airplane cabin that crashed on a mountain. Did you answer this riddle correctly?
YES NO
YES NO
Switch Or Stick Riddle
There are three doors: Door 1, Door 2, and Door 3. Behind one of these doors lies eternal bliss, but behind the others lies eternal despair. You are allowed to choose any door, and you pick Door 1. Suddenly, Door 3 is swung open and revealed to be despair! You are give another choice: you may stick with the door you chose (1) or switch to the other (2). What should you do?
Hint:
The answer may surprise you: switch. Due to something called the Monty Hall Paradox, you will statistically have a better chance of making the "correct" choice. The concept is as follows:
Door 1 Door 2 Door 3
All have an equal chance to be correct:
Door 1: 1/3 Door 2: 1/3 Door 3: 1/3
After choosing Door 1, the remaining two have a 2/3 chance of containing the right choice:
Door1: 1/3 Doors 2 3: 2/3
If Door 3 is removed, the probability does not shift to 50:50. Instead, it is:
Door 1: 1/3 Door 2: 2/3
Thus, you should switch. Did you answer this riddle correctly?
YES NO
Door 1 Door 2 Door 3
All have an equal chance to be correct:
Door 1: 1/3 Door 2: 1/3 Door 3: 1/3
After choosing Door 1, the remaining two have a 2/3 chance of containing the right choice:
Door1: 1/3 Doors 2 3: 2/3
If Door 3 is removed, the probability does not shift to 50:50. Instead, it is:
Door 1: 1/3 Door 2: 2/3
Thus, you should switch. Did you answer this riddle correctly?
YES NO
The House With No Doors Riddle
Hint:
A fish. A fish bowl or aquarium is the fishs house and the people inside are the decorative divers that offer no reply (one might ask how the fish knows, given that they arent a talkative bunch themselves). Did you answer this riddle correctly?
YES NO
YES NO
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