MoMath: the National Museum of Mathematics

MoMath: the National Museum of Mathematics The National Museum of Mathematics strives to enhance public understanding and perception of mathematics with hands-on, interactive exhibits and programs.
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Note MoMath closes early (2:30 pm) the first Wednesday of every month. Mathematics illuminates the patterns that abound in our world. The museum’s activities will lead a broad and diverse audience to understand the evolving, creative, human, and aesthetic nature of mathematics. Accomplishments to date include opening North America's only museum devoted to math and its many connections with nature, art, science, business, music, and everyday life; creating the popular Math Midway exhibition (mathmidway.org), which is currently touring museums throughout the United States; leading math tours in various U.S. cities; the Math Encounters (mathencounters.org) presentation series; delivering programs for students, teachers, and the public to increase appreciation of mathematics; and hosting over 125,000 visitors to date. Like most museums, MoMath cannot survive on admission revenue alone. If you believe in the mission of the National Museum of Mathematics, please support the institution by becoming a member (momath.org/join) or donor (momath.org/contribute). Thanks!

Operating as usual

Do you love coloring and math? 🎨 Join #MoMath as expert math educator Joshua Zucker leads Children of Dots, an online ev...
06/22/2021

Do you love coloring and math? 🎨 Join #MoMath as expert math educator Joshua Zucker leads Children of Dots, an online event where you can uncover patterns and learn how to “compute colors.” Bring your colored pens or pencils and participate in this colorful math event tonight at 6pm ET. Learn more and register at dots.momath.org

Do you love coloring and math? 🎨 Join #MoMath as expert math educator Joshua Zucker leads Children of Dots, an online event where you can uncover patterns and learn how to “compute colors.” Bring your colored pens or pencils and participate in this colorful math event tonight at 6pm ET. Learn more and register at dots.momath.org

Celebrate the #summersolstice by casting your shadow to mark the time! Join #MoMath at Flatiron Plaza from 8am-6pm to cr...
06/21/2021

Celebrate the #summersolstice by casting your shadow to mark the time! Join #MoMath at Flatiron Plaza from 8am-6pm to create a large-scale human sundial and leave your personal mark on a giant sundial banner. This free event is fun for the entire family ☀️

Sometimes a simple game, puzzle, or brainteaser has far more underlying math than we may think. Join Dr. Francesca Iezzi...
06/18/2021

Sometimes a simple game, puzzle, or brainteaser has far more underlying math than we may think. Join Dr. Francesca Iezzi, Dr. Ben Goddard, & Mary O’Brien from The University of Edinburgh tonight at 6:30pm ET to explore the math behind 3 puzzling/fun activities! Learn more and register at familyfridays.momath.org

Sometimes a simple game, puzzle, or brainteaser has far more underlying math than we may think. Join Dr. Francesca Iezzi, Dr. Ben Goddard, & Mary O’Brien from The University of Edinburgh tonight at 6:30pm ET to explore the math behind 3 puzzling/fun activities! Learn more and register at familyfridays.momath.org

Imagine a world where all triangles are isosceles and where big is small. Join #MoMath in a live-streamed event with Pau...
06/17/2021

Imagine a world where all triangles are isosceles and where big is small. Join #MoMath in a live-streamed event with Paul Zeitz tonight at 6:30pm ET to uncover this alternate world. We welcome you to the realm of the p‑adic number system! Learn more and register at isosceles.momath.org

Imagine a world where all triangles are isosceles and where big is small. Join #MoMath in a live-streamed event with Paul Zeitz tonight at 6:30pm ET to uncover this alternate world. We welcome you to the realm of the p‑adic number system! Learn more and register at isosceles.momath.org

#MoMath presents Math Gym, a workout for your brain! 💪🧠 Students in 4th grade and up spend an hour working on engaging a...
06/16/2021

#MoMath presents Math Gym, a workout for your brain! 💪🧠 Students in 4th grade and up spend an hour working on engaging and beautiful math problems with an expert mathematician while exploring new challenges. For more details about this free monthly series, visit workout.momath.org

#MoMath presents Math Gym, a workout for your brain! 💪🧠 Students in 4th grade and up spend an hour working on engaging and beautiful math problems with an expert mathematician while exploring new challenges. For more details about this free monthly series, visit workout.momath.org

06/14/2021

Just as Malcolm is finishing a meal, he notices the minute hand is on a minute mark exactly one minute ahead of the hour hand. Which meal is Malcolm finishing? Comment your vote below! #MathMonday

1. Breakfast
2. Lunch
3. Dinner

#MoMath’s second Folding Friday's event of the month is today at 4:30pm ET. Learn how to create the classic paper chain ...
06/11/2021

#MoMath’s second Folding Friday's event of the month is today at 4:30pm ET. Learn how to create the classic paper chain and see how long you can make yours! ⛓ This special origami event is for everyone – no experience required! Learn more and register at foldingfridays.momath.org

#MoMath’s second Folding Friday's event of the month is today at 4:30pm ET. Learn how to create the classic paper chain and see how long you can make yours! ⛓ This special origami event is for everyone – no experience required! Learn more and register at foldingfridays.momath.org

06/09/2021

High-fives all around because #MoMath is reopening on July 1! Who’s as excited as Ryan Eggold to ride MoMath’s Square-Wheeled Trike?! 😆 Timed-entry tickets are now on sale at visit.momath.org

06/07/2021

Here's this week's #MathMonday challenge:

Try making 32 two ways: first using 4, 5, and 7, then using 5, 6, and 7.

Comment your solutions below! ⬇️

Join us today from 10am-4pm outside of MoMath for “Madison Square Math,” a free outdoor event featuring mazes, a large s...
06/05/2021

Join us today from 10am-4pm outside of MoMath for “Madison Square Math,” a free outdoor event featuring mazes, a large scale version of Connect 4, a street-sized number line, and giant mathematical kaleidoscopes! See you there ☀️😎

During #MoMath's first Folding Fridays of June today at 4:30pm ET, learn how to fold two connected sailboats. This model...
06/04/2021

During #MoMath's first Folding Fridays of June today at 4:30pm ET, learn how to fold two connected sailboats. This model is called "Match Race" and was created by Francesco Mancini. Experimenting with paper colors, you can make an entire regatta! Learn more and register at foldingfridays.momath.org

During #MoMath's first Folding Fridays of June today at 4:30pm ET, learn how to fold two connected sailboats. This model is called "Match Race" and was created by Francesco Mancini. Experimenting with paper colors, you can make an entire regatta! Learn more and register at foldingfridays.momath.org

Today at 4pm ET we're hosting "Ask a Mathematician — Anything!" in person at the Museum with Alex Kontorovich! Come with...
06/03/2021
Meet a Mathematician – National Museum of Mathematics

Today at 4pm ET we're hosting "Ask a Mathematician — Anything!" in person at the Museum with Alex Kontorovich! Come with your own questions or just join to listen in. We'll also be streaming this event for those who want to participate online. Learn more and register at meetmath.momath.org

National Museum of Mathematics: Inspiring math exploration and discovery

BIG ANNOUNCEMENT! #MoMath is reopening its pi-handled doors to the public on July 1 at 9:30am! Safety is our top priorit...
06/02/2021

BIG ANNOUNCEMENT! #MoMath is reopening its pi-handled doors to the public on July 1 at 9:30am! Safety is our top priority, so we will be following official guidelines (available on our website) to provide a safe and healthy environment for all. Come explore our interactive exhibits and dynamic programs that make math fun, beautiful, and accessible for people of all ages and math proficiencies. We plan to begin offering events in person at the Museum, even as we plan to continue hosting online programs.

Timed admission tickets to MoMath are on sale at https://momath.org/visit/general-admission-calendar/

BIG ANNOUNCEMENT! #MoMath is reopening its pi-handled doors to the public on July 1 at 9:30am! Safety is our top priority, so we will be following official guidelines (available on our website) to provide a safe and healthy environment for all. Come explore our interactive exhibits and dynamic programs that make math fun, beautiful, and accessible for people of all ages and math proficiencies. We plan to begin offering events in person at the Museum, even as we plan to continue hosting online programs.

Timed admission tickets to MoMath are on sale at https://momath.org/visit/general-admission-calendar/

Happy #NationalCreativityDay! How do you use your creative mind when it comes to math?Many of #MoMath's exhibits/events ...
05/30/2021

Happy #NationalCreativityDay! How do you use your creative mind when it comes to math?

Many of #MoMath's exhibits/events encourage creativity whether it's painting symmetric patterns on a digital canvas, creating tessellations using magnetic shapes, or folding origami models!

Join Kathleen Sheridan today at 4:30pm EDT to learn how to fold this magnificent modular. You don’t want to miss it! Lea...
05/28/2021

Join Kathleen Sheridan today at 4:30pm EDT to learn how to fold this magnificent modular. You don’t want to miss it! Learn more and register at foldingfridays.momath.org

Join Kathleen Sheridan today at 4:30pm EDT to learn how to fold this magnificent modular. You don’t want to miss it! Learn more and register at foldingfridays.momath.org

John Horton Conway, one of the most brilliant mathematicians of recent times, died in April 2020. While contributing to ...
05/26/2021

John Horton Conway, one of the most brilliant mathematicians of recent times, died in April 2020. While contributing to many diverse fields of mathematics, he delighted in amusing people. One of his playful contributions to mathematics was in the subject of tiling (tessellations), and is called the "Conway Criterion." Any shape that conforms to his criterion will fill the plane with its copies, fitting together like jigsaw pieces, just by rotating the tile by 180 degrees repeatedly about certain points on its edges. To honor his memory, an app called Conway's Magical Pen has now been developed.

Join us tonight at 6:30pm EDT for an evening of exploration led by artist and technologist Anton Bakker, who will be joined by mathematician Doris Schattschneider and app developers Jonathan Bailey and Herman Tulleken. Learn how you can use the app to make freehand "Conway tiles" that are guaranteed to tile the plane. Your tiles can be simple or complex, straight or swirly, abstract or Escher-like — what you create is limited only by your imagination! Learn more and register at magicpen.momath.org.

John Horton Conway, one of the most brilliant mathematicians of recent times, died in April 2020. While contributing to many diverse fields of mathematics, he delighted in amusing people. One of his playful contributions to mathematics was in the subject of tiling (tessellations), and is called the "Conway Criterion." Any shape that conforms to his criterion will fill the plane with its copies, fitting together like jigsaw pieces, just by rotating the tile by 180 degrees repeatedly about certain points on its edges. To honor his memory, an app called Conway's Magical Pen has now been developed.

Join us tonight at 6:30pm EDT for an evening of exploration led by artist and technologist Anton Bakker, who will be joined by mathematician Doris Schattschneider and app developers Jonathan Bailey and Herman Tulleken. Learn how you can use the app to make freehand "Conway tiles" that are guaranteed to tile the plane. Your tiles can be simple or complex, straight or swirly, abstract or Escher-like — what you create is limited only by your imagination! Learn more and register at magicpen.momath.org.

Happy #NationalWineDay! Did you know that “wine tears,” the small droplets that fall back into your glass when you swirl...
05/25/2021

Happy #NationalWineDay! Did you know that “wine tears,” the small droplets that fall back into your glass when you swirl your wine, emerge from an unusual circular shockwave in the liquid created by a balance of 3 physical effects: a Marangoni stress effect, gravity, and bulk surface tension (the surface tension of the large pool of wine in the base of a glass)? If you remove any of those three effects, wine tears don't happen...Math is everywhere!

Happy #NationalWineDay! Did you know that “wine tears,” the small droplets that fall back into your glass when you swirl your wine, emerge from an unusual circular shockwave in the liquid created by a balance of 3 physical effects: a Marangoni stress effect, gravity, and bulk surface tension (the surface tension of the large pool of wine in the base of a glass)? If you remove any of those three effects, wine tears don't happen...Math is everywhere!

The figure below demonstrates how to draw a straight line through a pentagram to form seven non-overlapping triangles, a...
05/24/2021

The figure below demonstrates how to draw a straight line through a pentagram to form seven non-overlapping triangles, as indicated by the dots.

The challenge: Draw two straight lines through a pentagram to produce ten non-overlapping triangles. #MathMonday #MoMath

The figure below demonstrates how to draw a straight line through a pentagram to form seven non-overlapping triangles, as indicated by the dots.

The challenge: Draw two straight lines through a pentagram to produce ten non-overlapping triangles. #MathMonday #MoMath

Join #MoMath today at 4:30pm ET to learn how to fold this little known traditional magical box — similar to Pandora’s bo...
05/21/2021

Join #MoMath today at 4:30pm ET to learn how to fold this little known traditional magical box — similar to Pandora’s box! Learn more & register at foldingfridays.momath.org

Join #MoMath today at 4:30pm ET to learn how to fold this little known traditional magical box — similar to Pandora’s box! Learn more & register at foldingfridays.momath.org

Join Alex Kontorovich as MoMath welcomes Jordan Ellenberg for this month's "Meet A Mathematician" event today at 4pm ET....
05/20/2021

Join Alex Kontorovich as MoMath welcomes Jordan Ellenberg for this month's "Meet A Mathematician" event today at 4pm ET.

Jordan is a distinguished researcher and prolific expositor of mathematics, and has won a Guggenheim Fellowship and a Simons Fellowship for his research work in number theory, algebraic geometry, topology, and combinatorics. Learn more and register at meetmath.momath.org.

Join Alex Kontorovich as MoMath welcomes Jordan Ellenberg for this month's "Meet A Mathematician" event today at 4pm ET.

Jordan is a distinguished researcher and prolific expositor of mathematics, and has won a Guggenheim Fellowship and a Simons Fellowship for his research work in number theory, algebraic geometry, topology, and combinatorics. Learn more and register at meetmath.momath.org.

Can you spot what makes 1,001,000 / 997,002,999 so special? If so, do you have any idea how such a fraction was created?...
05/18/2021

Can you spot what makes 1,001,000 / 997,002,999 so special? If so, do you have any idea how such a fraction was created? Join popular math educator Joshua Zucker at 5:30pm ET as he shares the secret of how to construct fractions like these. Learn more and register at shift.momath.org

Can you spot what makes 1,001,000 / 997,002,999 so special? If so, do you have any idea how such a fraction was created? Join popular math educator Joshua Zucker at 5:30pm ET as he shares the secret of how to construct fractions like these. Learn more and register at shift.momath.org

Yesterday MoMath hosted “Madison Square Math,” a free outdoor event for New Yorkers to safely engage with several intera...
05/17/2021

Yesterday MoMath hosted “Madison Square Math,” a free outdoor event for New Yorkers to safely engage with several interactive math activities! This event will be held again on Saturday, June 5 from 10am-4pm ET right outside the Museum. Learn more at madison.momath.org

Ethan is holding a true coin and is told that among five identical looking coins on the table, one is counterfeit. The c...
05/17/2021

Ethan is holding a true coin and is told that among five identical looking coins on the table, one is counterfeit. The counterfeit is heavier or lighter than a true coin.

How can he find the counterfeit in two weighings using a simple two-pan balance? #MathMonday

Ethan is holding a true coin and is told that among five identical looking coins on the table, one is counterfeit. The counterfeit is heavier or lighter than a true coin.

How can he find the counterfeit in two weighings using a simple two-pan balance? #MathMonday

Ranked Choice Voting (or "Instant Runoff Voting"), being tried in NYC for the first time in the upcoming election, aims ...
05/16/2021
Ranked Choice Voting — Monday, May 17 at 7:00 pm ET (New York) - National Museum of MathematicsNational Museum of Mathematics

Ranked Choice Voting (or "Instant Runoff Voting"), being tried in NYC for the first time in the upcoming election, aims to find an alternative method to mere "plurality" for choosing the winner of an election with many contestants.

Join Alex Kontorovich, MoMath’s Distinguished Visiting Professor, tomorrow at 7pm ET to explore the mathematical aspects of such systems, including various paradoxes and impossibility theorems! Learn more and register at rankedchoice.momath.org

National Museum of Mathematics: Inspiring math exploration and discovery

Tomorrow from 10am-4pm ET MoMath is hosting a free NYC 'Open Culture' math event outside the Museum, featuring mazes to ...
05/15/2021

Tomorrow from 10am-4pm ET MoMath is hosting a free NYC 'Open Culture' math event outside the Museum, featuring mazes to navigate by foot, a large scale version of Connect 4, a street-sized number line that stretches over one hundred feet, and giant mathematical kaleidoscopes! Learn more and register at madison.momath.org

Tomorrow from 10am-4pm ET MoMath is hosting a free NYC 'Open Culture' math event outside the Museum, featuring mazes to navigate by foot, a large scale version of Connect 4, a street-sized number line that stretches over one hundred feet, and giant mathematical kaleidoscopes! Learn more and register at madison.momath.org

Join MoMath for Folding Fridays today at 4:30pm ET to fold a fantastic filly! 🐴 Learn more and register at foldingfriday...
05/14/2021

Join MoMath for Folding Fridays today at 4:30pm ET to fold a fantastic filly! 🐴 Learn more and register at foldingfridays.momath.org

Join MoMath for Folding Fridays today at 4:30pm ET to fold a fantastic filly! 🐴 Learn more and register at foldingfridays.momath.org

This Sunday, May 16 from 10am-4pm ET MoMath is bringing math and culture to the City streets with “Madison Square Math,”...
05/13/2021

This Sunday, May 16 from 10am-4pm ET MoMath is bringing math and culture to the City streets with “Madison Square Math,” a free outdoor event for New Yorkers to safely engage with interactive math activities right outside the Museum! This event is part of NYC's 'Open Culture' program to safely bring arts and culture to neighborhoods in the five boroughs. Learn more and register at madison.momath.org

This Sunday, May 16 from 10am-4pm ET MoMath is bringing math and culture to the City streets with “Madison Square Math,” a free outdoor event for New Yorkers to safely engage with interactive math activities right outside the Museum! This event is part of NYC's 'Open Culture' program to safely bring arts and culture to neighborhoods in the five boroughs. Learn more and register at madison.momath.org

In honor of #NationalLimerickDay, join MoMath tonight at 6:30pm ET for "Poetic Math," an evening of readings of original...
05/12/2021

In honor of #NationalLimerickDay, join MoMath tonight at 6:30pm ET for "Poetic Math," an evening of readings of original mathematical limericks as part of the Museum’s limerick contest! To learn more and/or to register for this event, visit limerick.momath.org.

In honor of #NationalLimerickDay, join MoMath tonight at 6:30pm ET for "Poetic Math," an evening of readings of original mathematical limericks as part of the Museum’s limerick contest! To learn more and/or to register for this event, visit limerick.momath.org.

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