Tag Archives: Brain Teasers

Heaven or Hell Puzzle

October 24, 2013 8:10 am | 61 Comments |
riddles

Puzzle: You are standing before two doors. One of the path leads to heaven and the other one leads to hell. There are two guardians, one by each door. You know one of them always tells the truth and the other always lies, but you don’t know who is the honest one and who is the … Read More →

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10 Coins Puzzle

October 23, 2013 10:31 pm | 12 Comments |

Problem: You are blindfolded and 10 coins are place in front of you on table. You are allowed to touch the coins, but can’t tell which way up they are by feel. You are told that there are 5 coins head up, and 5 coins tails up but not which ones are which. How do … Read More →

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13 Caves And A Thief Puzzle

September 14, 2013 12:09 pm | 24 Comments |
13-caves-and-a-thief-puzzle-150x150

Problem: There are 13 caves arranged in a circle. There is a thief  in one of the caves. Each day the the thief can move to any one of adjacent cave or can stay in smae cave in which he was staying the previous day. And each day, cops are allowed to enter any two … Read More →

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King and Wine Bottles

September 5, 2013 6:40 pm | 31 Comments |
king-wine-bottle

Problem: A bad king has a cellar of 1000 bottles of delightful and very expensive wine. A neighboring queen plots to kill the bad king and sends a servant to poison the wine. Fortunately (or say unfortunately) the bad king’s guards catch the servant after he has only poisoned one bottle. Alas, the guards don’t … Read More →

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Blind bartender’s problem

September 2, 2013 10:20 pm | Leave a Comment |
Four_tumblers-240x300

Problem: Four glasses are placed on the corners of a square table. Some of the glasses are upright (up) and some upside-down (down). A blindfolded person is seated next to the table and is required to re-arrange the glasses so that they are all up or all down, either arrangement being acceptable, which will be … Read More →

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Prisoners and Hats Puzzle

August 13, 2013 10:51 am | 6 Comments |
hatpuzzle

Problem: Four prisoners are arrested for a crime, but the jail is full and the jailer has nowhere to put them. He eventually comes up with the solution of giving them a puzzle so if they succeed they can go free but if they fail they are executed. The jailer puts three of the men … Read More →

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The Fox and The Duck Puzzle

July 28, 2013 11:09 pm | 6 Comments |
duck and fox puzzle

Problem: This is the classical puzzle asked in microsoft interview A duck, pursued by a fox, escapes to the center of a perfectly circular pond. The fox cannot swim, and the duck cannot take flight from the water. The fox is four times faster than the duck. Assuming the fox and duck pursue optimum strategies, … Read More →

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Gold Bar Puzzle

July 25, 2013 8:54 pm | Leave a Comment |
gold bar puzzle for interview

Puzzle: You’ve got someone working for you for seven days and a gold bar to pay him. The gold bar is segmented into seven connected pieces. You must give them a piece of gold at the end of every day. What and where are the fewest number of cuts to the bar of gold that will … Read More →

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River Crossing Puzzle

July 22, 2013 11:36 am | Leave a Comment |
River crossing puzzle

Problem: Sailor Cat needs to bring a wolf, a goat, and a cabbage across the river. The boat is tiny and can only carry one passenger at a time. If he leaves the wolf and the goat alone together, the wolf will eat the goat. If he leaves the goat and the cabbage alone together, … Read More →

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17 Horses Puzzle

July 15, 2013 9:35 am | 13 Comments |
17 horses and 3 sons puzzle

Problem: A farmer wants to divide his 17 horses among his three sons. According to farmer the oldest son should get half of the horses,the middle son should get one third of the horses and the youngest son should get one ninth of the horses. When their father died they were not able to divide … Read More →

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25 horses and 5 lanes

July 4, 2013 6:24 pm | 3 Comments |
25 horse and 5 lanes puzzle

Problem: There are 25 horses and 5 lanes. You have no idea about which horse is better than other. Find in minimum possible races, the first three fastest running horses. Solution: We will have 5 races with all 25 horses Let the results be u1,u2,u3,u4,u5 v1,v2,v3,v4,v5 x1,x2,x3,x4,x5 y1,y2,y3,y4,y5 z1,z2,z3,z4,z5 Work through a process of elimination: … Read More →

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Measure 4 gallon of water from 3 gallon and 5 gallon water jar

June 29, 2013 3:37 pm | 8 Comments |
measure 4 gallon water using 3 and 4 gallon jar

Problem : How to measure exactly 4 gallon of water from 3 gallon and 5 gallon jars, Given, you have unlimited water supply from a running tap. Solution: Step 1. Fill 3 gallon jar with water. ( 5p – 0, 3p – 3) Step 2. Pour all its water into 5 gallon jar. (5p – … Read More →

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