Josephus problem – Sword Killing and Survival Puzzle
The 73rd person will survives.
Consider the case when there are 2^n numbers in the circle. Each time the number reduces by half and the number 1 remains till the end.
In the given question,
1 kills 2,
3 kills 4 and so on till 71 kills 72.
36 people have been killed till now.
64 people remain in the circle.
64 is a power of 2. So the first guy after 72 will be the new number 1 in a circle of 2^6.
So 73 will survive.
Your Answer
More puzzles to try-
Killer’s Suspense
The richest man in the city Mr Rechard is kidnapped. James Bond is appointed to the case. At the crime ...Read More »Cow with rope
If a caw is tied to a piece of rope that is 5 m long, how can she reach a ...Read More »smell when coloured
If I am coloured, I smell, if I am burned, I smell, orange and yellow will melt me. What am ...Read More »Ice cream parlor brain teaser
Two women and two doctors walk into an ice cream parlor. Their favorite flavour was strawberry. Unfortunately, the parlor didn’t have much ...Read More »How do the campers make it across in 17 minutes?
Four people need to cross a rickety rope bridge to get back to their camp at night. Unfortunately, they only ...Read More »Maths Puzzle
Can you find out the remainder when 3^300 is divided by 5?Read More »Dimensions of Box
There is a box. The area of its top is 240 square units, the area of the front is 300 ...Read More »You are all where
You will find me in Mercury, Earth, Mars and Jupiter, but not in Venus or Neptune. What am I?Read More »Why did he die?
A man died in a telephone box with the sides smashed in, his hands are covered in blood and the ...Read More »Box with Defective Balls
Here is a situation. You have 10 boxes that contains balls with each of the ball weighing 10 grams precisely. ...Read More »How to Cross River
2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 ...Read More »Treasure in gold and silver pot puzzle
There is a silver pot and a golden pot. One of these pots contains a treasure and the other one ...Read More »Three brothers age Riddle
Three brothers Jacob, John, James lives in Mexico City. The product of ages of these brothers is 175. Jacob and ...Read More »The President of the USA
The 22nd and 24th presidents of the United States of America had the same parents but were not brothers. How ...Read More »Vacation Time
Four women, Louise, Lise, Carole and Lily are seated at a table. They are chatting about their holidays. They went ...Read More »1729 is a Magic Number
Why 1729 is a magic number? Answer Logically.Read More »Terrorist was genius or Stupid?
A terrorist hijacks an airplane with 10 passengers and there is lots of gold in the plane. After talking the ...Read More »Cricket Run Riddle
John has played 50 ODI’s and his average is 50. How many runs should he score in his 51st ODI, ...Read More »Square but round at the same time riddle
What\’s square but round at the same time?Read More »Car accident riddle
Two cars were involved in an accident in the centre of city. The man who was driving a little green ...Read More »
Accenture Interview PuzzlesAdobe Interview PuzzlesAge RiddleAkbar Birbal PuzzlesAlgorithm PuzzlesAlphabet riddleAmazon Interview PuzzlesAnalytical MathematicsAptitude PuzzleBank PuzzlesBetting PuzzlesBrain TeasersCalendar PuzzlesCards PuzzlesChess Board PuzzleChess PuzzlesChristmas Puzzlecipher PuzzleCivil Services PuzzleClock time puzzleCognizant Interview PuzzlesCoins PuzzleComputational PuzzleconundrumCoronavirus PuzzleCoupondunia Interview PuzzleCritical Thinking Puzzledata analyticsData Structure Interview QuestionsDecode PuzzleDetective PuzzlesDice PuzzleDictionary Riddlesdifficult riddleEasy Math puzzlesEasy puzzlesEinstein puzzleEnglish RiddleFamily Tree Puzzlefamous puzzleFill in the blanks riddlesFinding Killer RiddlesFlipkart interview puzzlesFunny RiddlesGeneral KnowledgeGeographical PuzzleGoogle Code Jam 2014Google Interview PuzzlesGRE PuzzleHard Puzzle