Home

Sticks and time measurement riddle

677.3K Views
Answered

There are two sticks. Each stick takes one hour to burn. These sticks are not identical, nor are they uniform. i.e. it does not necessarily take half an hour for half the stick to burn.

With only these two sticks and a way to light them, how do you measure out 45 minutes?

Share
SherlockHolmes Expert Asked on 26th December 2017 in Logic Puzzles.
Add Comment
Cancel

    • 1 Answer(s)
    Best answer

    As the sticks do not burn at a constant rate, we can not use the length of the stick as any sort of measurement of time.
    But, If we light a stick, it takes 60 minutes to burn completely.
    What if we light the stick from both sides? It will take exactly half the original time, i.e. 30 minutes to burn completely.

    Steps-
    0 minutes – Light stick 1 on both sides and stick 2 on one side.
    30 minutes – Stick 1 will be burnt out(0min left to burn). Light the other end of stick 2(After lighting other end 15min left).
    45 minutes – Stick 2 will be burnt out.

    Cancel
    SherlockHolmes Expert Answered on 29th December 2017.
    Add Comment
    Cancel

    • Your Answer

    By posting your answer, you agree to the privacy policy and terms of service.

  • More puzzles to try-

  • Accenture Interview PuzzlesAdobe Interview PuzzlesAmazon Interview PuzzlesAnalytical MathematicsAptitude PuzzleBrain TeasersCognizant Interview PuzzlesCritical Thinking Puzzledifficult riddleEasy Math puzzlesEasy puzzlesEnglish Riddlefamous puzzleFunny RiddlesGeneral KnowledgeHard Puzzlehard puzzlesIAS Interview Puzzleinterview questionknowledge puzzlelateral thinking puzzleLogic Puzzlesmathmathematical puzzleMicrosoft Interview PuzzlesMystery PuzzlesNDA Aptitude QuestionOptical illusion puzzleout of boxPermutation puzzlePicture Puzzleprobability puzzlesPuzzlePuzzle For KidspuzzlesPuzzles for interviewRiddleRiddles for KidsSherlock Holmes Mystery PuzzlesShort PuzzlesStupid logic puzzlesTIme Pass puzzlesTricky PuzzleTricky PuzzlesTricky RiddleViral PuzzlesVisual Logic puzzleWhat is it puzlleWhatsapp PuzzlesWho am i puzzle