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0 / 60 seg.
Below are six discs stacked on a peg. The object is to reassemble the discs, one by one, in the same order on another peg, using the smallest number of moves. No larger disc can be placed on a smaller disc. How many moves will it take?
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Clue
USE 4 HALF FILLED BARRELS TO FILL 2 EMPTY BARRELS. WE ARE THEN LEFT WITH 9 FULLY FILLED BARRELS, 3 HALF FILLED BARRELS AND 9 EMPTY BARRELS. EACH SON GETS 3 FULL BARRELS, 1 HALF-FULL BARREL, AND 3 EMPTY BARRELS
YOU WILL NEED 4 COINS. PLACE THREE COINS FLAT ON THE TABLE IN A TRIANGLE (TOUCHING EACH OTHER) AND PUT THE FOURTH ONE ON TOP OF THEM IN THE MIDDLE
THE MISSING NUMBER IS 4. SIMPLY ADD THE FIRST AND SECOND ROWS TOGETHER TO GET THE THIRD ROW VALUE. 65, 927 + 14, 354 80, 281
IT WILL TAKE 63 MOVES. FOR ANY NUMBER OF DISCS N, THE NUMBER OF MOVES CAN BE FOUND BY 2N - 1
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