You have two buckets – one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

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Complicated explantion!

Great explanation, Sid.

1. Fill the 3-gallon bucket.

2. Pour the 3 gallons of water into the 5-gallon bucket

3. Fill the 3-gallon bucket again.

4. Fill up the 5-gallon bucket with the 3-gallon bucket, leaving you with 1 gallon left in the 3-gallon bucket.

5. Empty out the 5-gallon bucket.

6. Pour the remaining 1 gallon of water from the 3-gallon bucket into the 5-gallon bucket.

7. Fill the 3-gallon bucket.

8. Pour the 3 gallons of water from the 3-gallon bucket into the 5-gallon bucket leaving you with 4 gallons of water in the 5-gallon bucket.

Alternate solution:

1. Fill up the 5 gallon bucket

2. Pour it into 3 gallon bucket, leaving 2 gallons

3. Empty out the 3 gallon bucket

4. Pour the 2 gallons in the 5 gallon bucket into the 3 gallon bucket

5. Fill up the 5 gallon bucket and pour it into the 3 gallon bucket until it’s full, leaving 4 gallons in the 5 gallon bucket.

Great job, you’re today’s winner.