In 1996, the mathematical logician George Boolos (above) published a paper describing “the hardest logic puzzle ever” which he attributed to the logician Raymond Smullyan. The jigsaw puzzle with the most pieces consisted of 551,232 pieces and was completed with an overall measurement of 14.85 x 23.20 m (48 ft 8.64 in x 76 ft 1.38 in) by 1,600 students of the University of Economics of Ho Chi Minh City (Vietnam), at the Phu Tho Stadium in Ho Chi Minh City, Vietnam, on 24 September 2011. The 1000 piece jigsaw puzzle is one of the most challenging puzzles you can make and it will take on average between 10 to 30 hours to complete. How long should a 1000 piece puzzle take? Jigsaw puzzle pieces are typically arranged in a grid, so the number of pieces along a side has to be a divisor of the total number of pieces. Jigsaw puzzles that say they have 1,000 pieces have approximately 1,000 pieces, but probably not exactly 1,000.
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