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FILL THE 5 OZ. AND 11 OZ. CONTAINERS FROM THE 24 OZ. CONTAINER. THIS LEAVES 8 OZ. IN THE 24 OZ. BOTTLE. NEXT EMPTY THE 11 OZ. BOTTLE BY POURING THE CONTENTS INTO THE 13 OZ. BOTTLE. FILL THE 13 OZ. BOTTLE FROM THE 5 OZ. CONTAINER (WITH 2 OZ.) AND PUT THE REMAINING 3 OZ. IN THE 11 OZ. BOTTLE. THIS LEAVES THE 5 OZ. CONTAINER EMPTY. NOW POUR 5 OZ. FROM THE 13 OZ. BOTTLE INTO THE 5 OZ. BOTTLE LEAVING 8 OZ. IN THE 13 OZ. BOTTLE. FINALLY POUR THE 5 OZ. BOTTLE CONTENTS INTO THE 11 OZ. BOTTLE GIVING 8 OZ. IN THIS CONTAINER FILL UP THE THREE-GALLON JUG AND POUR IT INTO THE FIVE-GALLON JUG. DO IT AGAIN AND THERE WILL BE ONE GALLON LEFT IN THE THREE-GALLON JUG. EMPTY THE FIVE-GALLON JUG AND POUR IN THE ONE GALLON OF WATER FROM THE THREE-GALLON JUG. FILL THE THREE-GALLON JUG WITH WATER AGAIN AND POUR IT INTO THE FIVE-GALLON JUG. THE FIVE-GALLON JUG SHOULD NOW CONTAIN 4 GALLONS OF WATER IT WILL TAKE 2 HOURS TO MEET. METHOD 1: IGNORE THE SPEED OF THE STREAM, AS THE BOBBER WILL BE CARRIED ALONG AT THREE MILES PER HOUR AS WILL YOU. IT TAKES TWO HOURS TO TRAVEL FOURTEEN MILES, AT A RATE OF SEVEN MILES PER HOUR. METHOD 2: AS THE BOBBER TRAVELS AT 3 MPH, IT WILL BE SIX MILES CLOSER TO YOU IN TWO HOURS. THE DISTANCE BETWEEN YOU AND THE BOBBER BECOMES 8 MILES (14 - 6). IN TWO HOURS YOU WOULD HAVE TRAVELLED 8 ( (7-3) X 2 ) MILES FIRST FILL THE 9-LITRE BUCKET. THEN POUR 4 LITRES OVER TO THE 4-LITRE BUCKET (THERE ARE NOW 5 LITRES IN THE 9-LITRE BUCKET), AND THEN POUR OUT THE WATER FROM THE 4-LITRE BUCKET. AGAIN POUR 4 LITRES FROM THE 9-LITRE BUCKET TO THE 4-LITRE BUCKET AND EMPTY IT. THERE WILL NOW BE JUST 1 LITRE LEFT IN THE 9-LITRE BUCKET. NOW POUR THAT REMAINING 1 LITRE TO THE 4-LITRE BUCKET BUT THIS TIME KEEP IT THERE. FILL THE 9-LITRE BUCKET AGAIN AND THEN POUR WATER TO FILL THE 4-LITRE BUCKET TO THE TOP (THIS ONLY NEEDS 3 MORE LITRES). THE 9-LITRE BUCKET WILL NOW CONTAIN EXACTLY 6 LITRES