A popular joke told over Halloween and Thanksgiving is:

*Q: What do you get when you divide the circumference of a pumpkin by its diameter?
A: Pumpkin pi.*

The joke has been cited in print since at least 1998.

“What do you get when you take green cheese and divide its circumference by its diameter?”/“Moon pi” is another “pi(e)” joke.

Wikipedia: Pi

The number π is a mathematical constant, the ratio of a circle’s circumference to its diameter, commonly approximated as 3.14159. It has been represented by the Greek letter “π” since the mid-18th century, though it is also sometimes spelled out as

*“pi”*(/paɪ/).

Google Groups: alt.support.depression.manic

Final Jokes (Some Raunchy and Some Political) from James

*James D. Milton*

11/1/98

“Halloween Q & A”

(...)

Q: What do you get when you divide the circumference of a jack-o-lantern by its diameter?

A: Pumpkin pi

Google Groups: sci.math

Ann: Science Jokes updated

*Dave Bostock*

11/4/99

A possible addition that I observed in a Holloween post of rec.humor if not already in the Sci. list.

What do you get when you divide the circumference of a pumpkin by it’s diameter ? .... drum roll ... pause ... more drum roll ...

pumpkin pi

Google Groups: alt.christnet.prayer

Daily Devotional 10/31/00 Tuesday

*Shirley Lin*

10/31/00

(...)

What do you get if you divide the circumference of a jack-o-lantern by it’s diameter? Pumpkin pi

Google Books

*One Man’s Journey Through Mathematics*

By Marvin L. Bittinger

Boston, MA: Addison-Wesley

2004

Pg. 108:

What do you get if you divide the circumference of a jack-o-lantern by its diameter?

Pumpkin pi.

Google Books

*The World’s Greatest Wacky One-Line Jokes*

By Bob Phillips

Eugene, OR: Harvest House Publishers

2005

Pg. 86:

What do you get if you divide the circumference of a pumpkin by its diameter?

Pumpkin pi.

matt lambert

@mattlambert

Teacher: What do you get if you divide the circumference of a pumpkin by its diameter?

Student: Pumpkin pi.

2:52 AM - 18 Feb 2008

Google Books

*The Mammoth Book of One-Liners*

By Geoff Tibballs

London: Constable & Robinson Ltd.

2012

Pg. ?:

What do you get if you divide the circumference of a pumpkin by its diameter?

Pumpkin pi.

DinnerPartyDownload

@dinnerpartydnld

What do you get if you divide the circumference of a pumpkin by its diameter?

Pumpkin pi!

-A #joke from @JSim07 to use on #Thanksgiving

10:00 AM - 26 Nov 2015