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BOTH ENDS ARE NAILED WITH THE SAME NAIL. IN ORDER FOR THE 10 FOOT CHAIN TO DIP DOWN 5 FEET, IT MUST DIP 5 FEET DOWN AND 5 FEET UP, TOTALING THE LENGTH OF THE CHAIN 66 SECONDS. WHEN THE CLOCK STRUCK SIX, THERE WERE ONLY 5 INTERVALS BETWEEN STROKES, AND EACH INTERVAL WAS 6 (30/5) SECONDS. BETWEEN THE FIRST AND TWELFTH STROKES THERE WILL BE 11 INTERVALS OF 6 SECONDS EACH; THEREFORE, 12 STROKES WILL TAKE 66 SECONDS 2 HOURS. IN ONE HOUR, FRED CAN EAT 27, ALICE CAN EAT 12, AND KELLY CAN EAT 21 CHOCOLATES. A TOTAL OF 60 CHOCOLATES. THEREFORE THEY WOULD TAKE 2 HOURS TO EAT 120 CHOCOLATES LET'S SAY THAT THE FARMER IS TRANSPORTING THE WOLF, THE SHEEP AND THE CABBAGE FROM POINT A TO POINT B. FARMER TRANSPORTS THE SHEEP FROM A TO B. FARMER GOES BACK TO A. FARMER TRANSPORTS THE CABBAGE FROM A TO B. FARMER TRANSPORTS THE SHEEP BACK FROM B TO A. FARMER TRANSPORTS THE WOLF FROM A TO B. FARMER GOES BACK TO A. FARMER TRANSPORTS THE SHEEP FROM A TO B