Why Friday the 13th is a mathematical inevitability (opens in new tab)

(scientificamerican.com)

3 points165944709112d ago1 comments

1 comments

Or 12 / 7 > 1 so most maybe all years will have a F13

j / k navigate · click thread line to collapse

(scientificamerican.com)

3 points165944709112d ago1 comments

Or 12 / 7 > 1 so most maybe all years will have a F13

j / k navigate · click thread line to collapse