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Do you fear Friday the 13th?

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Do you have Paraskevidekatriaphobia? If you do, 2012 is a bad year for you. Paraskevidekatriaphobia is the fear of Friday the 13th. In most years, two Fridays fall on the 13th. In 2012 and again in 2015 there will be three. Tom Fernsler is a University of Delaware math professor who has studied Friday…
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