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Puzzle #10: Measure 4 Gallon of Water from 3 Gallon and 5 Gallon Water Jar | Amazon
How to measure exactly 4 gallon of water from 3 gallon and 5 gallon jars, Given, you have unlimited water supply from a running tap.
Puzzle Solution:
Step 1: Fill 3 gallon jar with water. ( 5p – 0, 3p – 3)
Step 2: Pour all its water into 5 gallon jar. (5p – 3, 3p – 0)
Step 3: Fill 3 gallon jar again. ( 5p – 3, 3p – 3)
Step 4: Pour 3 gallon jar water into 5 gallon jar until it is full. Now you will have exactly 1 gallon water remaining in 3 gallon jar. (5p – 5, 3p – 1)
Step 5: Empty 5 gallon jar, pour 1 gallon water from 3 gallon jar into 5 gallon jar. Now 5 gallon jar has exactly 1 gallon of water. (5p – 1, 3p – 0)
Step 6: Fill 3 gallon jar again and pour all its water into 5 gallon jar, thus 5 gallon jar will have exactly 4 gallon of water. (5p – 4, 3p – 0)
We are done !