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# Topic: *math*

## Anastasia Chavez explains the 21-card trick

How can you use math to astonish your friends and family? Try the 21-card trick. Filmed for Numberphile, UC Davis Department of Mathematics Postdoc Anastasia Chavez demonstrates step-by-step how this trick works with ...

## Can you solve the Mondrian squares riddle?

Dutch artist Piet Mondrian’s abstract, rectangular paintings inspired mathematicians to create a two-fold challenge. Can you solve the puzzle and get to the lowest score possible? Board game and puzzle designer and...

## The Art Of Making Noodles By Hand: Peter Song and Shuichi Kotani

Throwing, twisting, stretching, pulling, multiplying. In the first half of this Tasty video, Kung Fu Kitchen's noodle master Peter Song demonstrates how he handmakes his restaurants' famous noodles: Hand-making pr...

## Observing the angle of repose with DIY physics devices

The angle of repose or critical angle of repose is how steep various types of materials can be piled without slumping. The steepness of the side of a pile is determined by the amount of friction between the particles ...

## Can you solve the penniless pilgrim riddle?

After months of travel, you’ve arrived at Duonia, home to the famous temple that’s the destination of your pilgrimage. The walk from the welcome center to the temple isn't a long one ... but there’s a problem. Can you...

## Can you solve the wizard standoff riddle?

You’ve been chosen as a champion to represent your wizarding house in a deadly duel against two rival magic schools. Your opponents are a powerful sorcerer who wields a wand that can turn people into fish, and a power...

## Math in Motion: Playing with a desktop Galton Board

This delightful little device brings to life the statistical concept of normal distribution. As you rotate the Galton Board on its axis, you set into motion a flow of steel beads that bounce with equal probability to ...

## The Four-Legged Zoo: Multiplication by 4 with Schoolhouse Rock

The Four-Legged Zoo" is one in a series of Multiplication Rock episodes by Schoolhouse Rock! that were written and sung by Bob Dorough. Via wikipedia, the animated shorts "were created after ad agency co-chairman Davi...

## Professor Kokichi Sugihara creates his mind-blowing illusions with math

Professor Kokichi Sugihara is world-renowned for his award-winning impossible objects and reality-defying illusions. He uses mathematics to make the three-dimensional objects that create his impossible scenes and illu...

## The Very Hungry Maggot: How larva farming can help reduce food waste

How are maggots like waves in an ocean? How are they like puppies? In this fascinating Macroscope video from Science Friday, The Very Hungry Maggot, we meet David Hu, a mechanical engineering professor who's studying ...

## How To Make Geometric Pies by lokokitchen

Self-taught baker Lauren Ko creates geometric pies and shares them on her popular Instagram account lokokitchen. In this Tasty video, she talks about what inspired her to start baking, how she learns new tricks, and h...

## How Notes and Beats Go Together (The Rhythm Pyramid) – Classical MPR

How do musicians know what notes to play and for how long each note lasts? How do the notes and beats mix to make music? From Classical Minnesota Public Radio‘s Class Notes series, learn about note duration and rhythm...

## The infinite life of pi

The ratio of a circle's circumference to its diameter is always the same: 3.14159... and on and on (literally!) forever. This irrational number, pi, has an infinite number of digits, so we'll never figure out its exac...

## How To Make a Hexaflexagon: The Definitive Guide

How do you make a hexaflexagon in under a minute from any long scrap of paper without scissors, tape, or glue? 'Mathemusician' Vi Hart is well-known for her love of hexaflexagons, hexagonal flat paper models that can ...

## The Sound of Ice: Skating on thin black ice makes sci-fi movie laser sounds

This small lake outside Stockholm, Sweden, emits otherworldly sounds as Mårten Ajne skates over its precariously thin, black ice. “Wild ice skating,” or “Nordic skating,” is both an art and a science. A skater seeks o...

## Universal Calendar Puzzle: Figure out the day of the week for any date ever

Learn how to calculate the day of the week for any date you can think of with this impressive mental trick and some practice. In this It's Okay to Be Smart video, Universal Calendar Puzzle, Joe Hanson demonstrates the...

## How to multiply numbers by drawing lines

Learn how drawing lines and counting can visually calculate multi-digit multiplication problems. This handy math trick, sometimes referred to as the Japanese Multiplication Trick, lets little kids, visual learners, an...