Brain Teasers For All

    Other Pages:  Welcome!     Home    Contents Get your brain teaser solved! View my blog on particle physics here What is the  Colour of the Hat?  - Answer Age group: All The question was: "There are 3 black hats and 2 white hats in a box. Three men (say A, B and C) have a random hat placed on their heads. They cannot see what colour hat they have. The men are situated in such a way that A can see the hats on B and C's hats, B can only see the hat on C's head and C cannot see any hat. When A is asked if he can identify the colour of his hat, he refuses. Next, when B is asked the same question, he refuses too.  However, C, who couldn't see anyone else's hat, says yes and correctly identifies the colour of the hat on his head.  How did he know and what was the colour of his hat?" You can also view the question here: What is the Colour of the Hat? Now coming to the Answer! We know that there are 3 black hats and 2 white hats.  A...

     Other Pages:  Welcome!     Home   Contents Get your brain teaser solved! View my blog on particle physics here WHAT IS THE COLOUR  OF THE HAT? Age group: All Hi all! I am back with yet another exciting puzzle! "There are 3 black hats and 2 white hats in a box. Three men (say A, B and C) have a random hat placed on their heads. They cannot see what colour hat they have. The men are situated in such a way that A can see the hats on B and C's hats, B can only see the hat on C's head and C cannot see any hat. When A is asked if he can identify the colour of his hat, he refuses. Next, when B is asked the same question, he refuses too.  However, C, who couldn't see anyone else's hat, says yes and correctly identifies the colour of the hat on his head.  How did he know and what was the colour of his hat?" Solve this and do let me know your answers in the comment section! You can find the answer to this puzzle here: What is the Colour of th...

     Other Pages:  Welcome!     Home   Contents Get your brain teaser solved! View my blog on particle physics here MINIMUM MOVES TO  OPEN THE DOORS? Age group: All Hi everyone, this is one of the questions which I found in an old examination paper and I thought of sharing it here! Do try this and let me know your answers as well as the working which led to the answer: "There are 5 persons who are trapped in 5 different elevators. There are 49 floors in the building. The 5 persons are respectively on the 17th, 26th, 20th, 19th, 31st floors. The elevator doors open only when all the elevators are between 21st and 25th floor in descending order. There are 2 buttons +8 and -13 that will be activated only when 2 elevators are selected together. The person on the 19th floor decides to take charge and get all of them out.  What is the minimum number of moves in which he can accomplish the target?" Solve this and do let me know your answers in the c...

      Other Pages:  Welcome!     Home    Contents Get your brain teaser solved! View my blog on particle physics here 80 Kg Only -  Answer Age group: All The question was: "John, a party magician, is carrying three bars of gold, each weighing one kilogram. On the way to a session, he comes to a bridge, which has a sign posted saying the bridge can bear a weight of only 80 kilograms. John weighs 78 kilograms and the gold weighs 3 kilograms in total. He read the sign and still safely crossed the bridge with all the gold in one go. How did he manage to do this?" You can also view the question here: 80 Kg Only Now coming to the Answer! We are going to use the concept of weightlessness , i.e. during free fall, the body is weightless. John, being a party magician, can cross the bridge in one go by juggling the three bars of gold, such that one of the bars is always in the air, under free fall, which results in the total weight being 80 Kg at all ti...

     Other Pages:  Welcome!     Home   Contents Get your brain teaser solved! View my blog on particle physics here 80 Kg Only Age group: All "John, a party magician, is carrying three bars of gold, each weighing one kilogram. On the way to a session, he comes to a bridge, which has a sign posted saying the bridge can bear a weight of only 80 kilograms . John weighs 78 kilograms and the gold weighs 3 kilograms in total. He read the sign and still safely crossed the bridge with all the gold in one go . How did he manage to do this? " Solve this and do let me know your answers in the comment section! You can find the answer to this puzzle here: 80 Kg Only - Answer Get your brain teaser solved! See my other posts here: My posts! View the contents of this blog for easy and better navigation! Contents View my blog on particle physics here With Warm Wishes, Lavanya

  Other pages:  Welcome!     Home    Contents Get your brain teaser solved! View my blog on particle physics here Which One is Heavier?  - Answer Age group: All The question was: "You have 9 marbles: 8 of them weigh 1 gram each; 1 weighs 1.1 gram. The 9 marbles are all uniform in size, appearance and shape. You have access to a balance scale containing 2 trays - you may use the balance twice. You must determine which of the 9 marbles is the heavier one using the balance only twice." You can also view the question here: Which One is Heavier? Now coming to the Answer! The important point to keep in mind here is that the balance can be used only twice . There are a total of 9 marbles, and we must divide them in such a way that we can compare all balls in 2 uses of the balance. The way to go is as follows: Divide the 9 marbles into groups of 3 . Let the groups be A (containing marbles A1, A2, A3), B ( containing marbles B1, B2, B3) and C (containing marble...

      Other pages:  Welcome!     Home   Contents Get your brain teaser solved! View my blog on particle physics here Which One is Heavier? Age group: All "You have 9 marbles: 8 of them weigh 1 gram each; 1 weighs 1.1 gram. The 9 marbles are all uniform in size, appearance and shape. You have access to a balance scale containing 2 trays - you may use the balance twice. You must determine which of the 9 marbles is the heavier one using the balance only twice. " Solve this and do let me know your answers in the comment section! You can find the answer to this puzzle here: Which One is Heavier? - Answer Get your brain teaser solved! See my other posts here: My posts! View the contents of this blog for easy and better navigation! Contents View my blog on particle physics here With Warm Wishes, Lavanya

      Other pages:  Welcome!     Home    Contents Get your brain teaser solved! View my blog on particle physics here THE MISSING MONEY  - ANSWER Age group: All The question was: "Three friends check into a motel for the night and the clerk tells them the bill is Rs. 3000, payable in advance. So, they each pay the clerk Rs. 1000 and go to their room. A few minutes later, the clerk realises he has made an error and overcharged the trio by Rs. 500. He asks the Assistant to return Rs. 500 to the 3 friends who had just checked in. The Assistant sees this as an opportunity to make Rs. 200 as he reasons that the three friends would have a tough time dividing Rs. 500 evenly among them; so he decides to tell them that the clerk made a mistake of only Rs. 300, giving a hundred rupee note back to each of the friends. He pockets the leftover Rs. 200 and goes home for the day! N ow, each of the three friends gets a hundred rupee back. thus they each paid...

      Other pages:  Welcome!     Home   Contents Get your brain teaser solved! View my blog on particle physics here THE MISSING MONEY Age group: All Here is a very popular puzzle which I am sure all of you will be able to solve! "Three friends check into a motel for the night and the clerk tells them the bill is Rs. 3000, payable in advance. So, they each pay the clerk Rs. 1000 and go to their room. A few minutes later, the clerk realises he has made an error and overcharged the trio by Rs. 500. He asks the Assistant to return Rs. 500 to the 3 friends who had just checked in. The Assistant sees this as an opportunity to make Rs. 200 as he reasons that the three friends would have a tough time dividing Rs. 500 evenly among them; so he decides to tell them that the clerk made a mistake of only Rs. 300, giving a hundred rupee note back to each of the friends. He pockets the leftover Rs. 200 and goes home for the day!  Now, each of the three friends ...

    Other pages:  Welcome!     Home    Contents Get your brain teaser solved! View my blog on particle physics here HOW MANY ORANGES  WERE ORIGINALLY PRESENT?  - ANSWER Age group: All The question was:   "Three friends, Pierce, Quinton and Ronald, went camping. At night, after setting up camp, they went to bed. They had carried with them a box of oranges.  During the night, Pierce woke up and decided to  hide his share of oranges  and hid a  third , then promptly fell asleep again. Quinton woke up shortly thereafter and also decided to  hide a third of the remaining oranges  and he also went back to sleep. Finally, Ronald woke up and seeing the others were asleep,  took a third of what was left . Of course, none of them knew of the other's antics. So, in the morning, they shared the  remaining oranges, each receiving sixteen.   How many oranges were in the crate originally? " You can also view...

      Other pages:  Welcome!     Home   Contents Get your brain teaser solved! View my blog on particle physics here HOW MANY ORANGES WERE ORIGINALLY PRESENT? Age group: All Hello everyone! Here is another interesting brainteaser for you! "Three friends, Pierce, Quinton and Ronald, went camping. At night, after setting up camp, they went to bed. They had carried with them a box of oranges.  During the night, Pierce woke up and decided to hide his share of oranges and hid a third , then promptly fell asleep again. Quinton woke up shortly thereafter and also decided to hide a third of the remaining oranges and he also went back to sleep. Finally, Ronald woke up and seeing the others were asleep, took a third of what was left . Of course, none of them knew of the other's antics. So, in the morning, they shared the remaining oranges, each receiving sixteen.   How many oranges were in the crate originally? " Solve this and do let me know your an...

  Other pages:  Welcome!     Home    Contents Get your brain teaser solved! View my blog on particle physics here HOW MANY  GOLD COINS?  - ANSWER Age group: All The question was: "A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, 'How many gold coins do we have?'  After pausing a moment, he replied, 'Well! If I divide the coins into two unequal numbers, then 67 times the difference between the two numbers equals the difference between the squares of the two numbers. ' His wife looked puzzled. Can you help the merchant's wife by finding out how many gold coins they have ? " You can also view the question here: How Many Gold Coins? Now coming to the Answer! Let the two unequal parts be x and y . We have to find the total number of coins i.e. (x+y). From the given statement: 67 times the difference (x-y) = difference between squares of two numbers (x^2 - y^2) i.e. 67(x-y) = x^2 - ...

      Other pages:  Welcome!     Home   Contents Get your brain teaser solved! View my blog on particle physics here HOW MANY GOLD COINS? Age group: All One of the easiest brain teasers if you have paid attention in your middle school mathematics class :D "A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, 'How many gold coins do we have?' After pausing a moment, he replied, 'Well! If I divide the coins into two unequal numbers, then 67 times the difference between the two numbers equals the difference between the squares of the two numbers. ' His wife looked puzzled. Can you help the merchant's wife by finding out how many gold coins they have ?" Solve this and do let me know your answers in the comment section! You can find the answer to this puzzle here: How Many Gold Coins? - Answer Get your brain teaser solved! See my other posts here: My posts! View the contents of this blog for ea...

      Other pages:  Welcome!     Home    Contents Get your brain teaser solved! View my blog on particle physics here WHO DID IT?  - ANSWER Age group: All The question was: "There are five kids playing kickball. One of them kicked the ball so hard that they broke a window. When they are each questioned about what happened, each one of the kids gave three statements –   one is a lie and two are true .  The statements are:  Steve:  One of us is going to be in big trouble.  I didn’t do it.  Margaret will tell who did it.  Jesse:  I hate kickball.  Amanda did it.  I didn’t do it.  Mark:  Margaret doesn’t know who did it.  Amanda and I are good friends.  I didn’t do it.  Amanda:  I have never broken a window.  I never saw Mark before today.  Jesse lied when he said I was the one who broke the window.  Margaret:   I want to go home.  I didn’t br...