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4 bottles and water puzzle

(6 votes, average: 3.33 out of 5)

September 22, 2013 by puzzler 6 Comments

There are two bottles of 10 liter; each completely filled with water. Now 2 persons having empty bottles of 4 liter and 5 liter want to take 2-2 liters of water. You can use only these 4 bottles (10 liter-full, 10 liter-full, 5 liter-empty, 4 liter-empty) to transfer the water. Wasting or throwing of water is not permitted. How can this be done?

Note: It is assumed that you can not measure water level by comparing water level, or by judging, it should be exact 2 liters of water finally in each 4 and 5 liter water bottle.


This puzzle is courtsey Kranthi Kumar, shared on our facebook page.

Click here for solutionHide Solution
Do as described in the table and you will finally have 2 liters f water in 4 and 5 liter water bottle without wasting any water.

Four water bottles puzzle solution
Water Bottles First 10 Liter water bottle Second 10 liter water bottle 4 liter water bottle 5 liter water bottle
Initial State 10 10 0 0
fill 5 liter bottle comppletely 10 5 0 5
fill 4 liter bottle completely from 5 liter bottle 10 5 4 1
empty 4 liter bottle to 2nd 10 liter bottle 10 9 0 1
transfer remaining 1 liter water from 5 liter bottle to 4 liter bottle 10 9 1 0
again fill 5 liter bottle from 2nd 10 liter bottle 10 4 1 5
fill 4 liter bottle completely from 5 liter bottle, it already had 1 liter water 10 4 4 2
empty 4 liter bottle to 2nd 10 liter bottle 10 8 0 2
fill 4 liter bottle with first 10 liter bottle 6 8 4 2
fill 2nd 10 liter bottle from 4 liter bottle 6 10 2 2
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Comments

  1. Sonam says

    May 8, 2014 at 9:18 pm

    Solution with minimum no of steps
    10 10 0 0 – Initial state
    6 5 5 4 – step 1
    6 9 5 0 – step 2
    7 9 0 4 – step 3
    7 4 5 4- step 4
    7 8 5 0- step 5
    10 8 2 0- step 6
    6 8 2 4- step 7
    6 10 2 2- step 8

    Reply
  2. Varun says

    April 21, 2014 at 5:01 pm

    10 10 0 0
    10 5 0 5
    10 5 4 1
    10 9 0 1
    10 9 1 0
    10 4 1 5
    10 4 4 2
    10 8 0 2
    6 8 4 2
    6 10 2 2

    Reply
  3. Michaelangelo says

    April 15, 2014 at 2:17 pm

    Fill the 4 litre bottle from the 10 litre bottle and empty it. Repeat it once more. You will be left with 2 litre. Repeat the same with the other 10 litre bottle.

    Reply
    • RUKMANISELVARAJ says

      August 19, 2014 at 11:17 am

      read the questions properly

      Note: It is assumed that you can not measure water level by comparing water level, or by judging, it should be exact 2 liters of water finally in each 4 and 5 liter water bottle.

      Reply
  4. Shraddha says

    January 8, 2014 at 3:38 pm

    First we will fill the4 ltr bottle completely n thn divide it into 2 equal halves so each bottle now hav exactly 2 ltrsof water..!!

    Reply
    • ashu says

      January 11, 2014 at 4:25 pm

      nope! its wrong! read the “NOTE” you cant judge !!

      Reply

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