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Measuring water puzzle

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You had an infinite supply of water and a 5 ml and 3 ml gallons.

How would you measure exactly 4 ml in least number of steps ?

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John123 Expert Asked on 1st August 2015 in Interview Puzzles.
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    • 2 Answer(s)

    EXACTLY IN 3 STEPS
    STEP 1 –  First fill the 3 ml then it pour into 5ml gallons
    STEP 2-  then again fill the 3ml again pour into 5ml gallons this time u have 1ml left in the the 3ml gallons.
    and then throw the 5ml water .and rest of 1ml water put into it
    and final step is put a 3 ml of water and pour into the 5 ml .u will get the 4 ml

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    sid123 Curious Answered on 20th October 2015.
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    A) Fill 5 ml gallon ( 5mlGallon – 5, 3mlGallon – 0)
    B) Transfer to 3 ml gallon (5mlGallon – 2, 3mlGallon – 3)
    C) Empty 3 ml gallon ( 5mlGallon – 2, 3mlGallon – 0)
    D) Transfer 2 ml from 5 ml gallon to 3 ml gallon (5mlGallon – 0, 3mlGallon – 2)
    E) Fill 5 ml gallon(5mlGallon – 5, 3mlGallon – 2)
    F) Transfer 1 ml from 5 ml gallon to 3 ml gallons(5mlGallon – 4, 3mlGallon – 3)

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    ravi Expert Answered on 1st August 2015.
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