Measuring Four Gallons of Water - Can you solve it?

28. Measuring Four Gallons of Water

How can you measure exactly 4 gallons of water using only a 5-gallon container and a 3-gallon container?

Added 4 March 2020

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Solution:

Fill the 5-gallon container.

Pour it into the 3-gallon container, leaving 2 gallons in the 5-gallon container.

Empty the 3-gallon container.

Transfer the 2 gallons from the 5-gallon container into the 3-gallon container.

Refill the 5-gallon container.

Pour water from the 5-gallon container into the 3-gallon container until the latter is full (it needs 1 gallon).

The 5-gallon container now contains exactly 4 gallons of water.

Comments (1)

Anonymous 8 January 2009

i have an alternate answer for the 4 gallon problem...fill up the 3 gallon anp pour it into the 5 gallon and again fill up the 3 gallon and pour it into the five gallon.. now 1 gallon will be there in the 3 gallon... pour out all the water out of 5 gallon and fill it up with that one gallon ..now measure 3 gallon and pour into 5 gallon to bring out 4....

please provide the answers for the difficult and very difficult problems...

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