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4 bottles and water puzzle
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.
|WATER BOTTLES||FIRST 10 LITER WATER BOTTLE||SECOND 10 LITER WATER BOTTLE||4 LITER WATER BOTTLE||5 LITER WATER BOTTLE|
|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|