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it depends on the size of your coin , so that answer is varys
Fill the 5 litre bottle. Use the 5 L bottle to fill the 3 L bottle. Pour out the water from the 3 L bottle. Pour the last 2L from the 5 L bottle into the 3 L bottle Now fill the 5 L bottle from the tap. 5L + 2L = 7L.
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1. Fill 4 gallon bottle 2. Pour IT into the 7-gallon bottle 3. Fill 4 gallon again, and pour IT into 7 gallon (leaves 1 gallon in 4 gallon bottle) 4. Empty 7 gallon 5. Pour the 1 gallon into the 7-gallon 6. Fill 4 gallon 7. Pour IT into the 7 gallon You now have 5 gallons in the 7-gallon bottle.
See related link below for coin counting