PDF is 4 foot 8.5 inchesTom Carson - Director of Technology Curriculum Development, The New Economy Institute
"To keep my students on their toes, I often have a riddle that will reward them with a free lunch. One of my favorites is that PDF is 4 foot 8 1/2 inches and that 4 foot 8 1/2 inches is one of the most important numbers in American History (and world history). The answers to this question have been very intriguing. One student said that Napoleon was 4' 8 1/2", although I really do now know this was important to American History."
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