How Many Colors For The Map

August 14, 2022

Son was filling colors in his drawings, which reminded me of some fun in math: “Do you know how many colors are needed for a world map?” I asked son. “Many colors?” “Let me ask the question better. There are many countries in the world. In the map, we want to use different colors for […]

Find Patterns, Solve Problems

August 14, 2022

“What’s the last digit of 18100?” I asked my son all of a sudden. “Wow, it will take some time to calculate the answer!” Son replied. “I can tell you the answer in a few seconds. So can you.” “Really?” “Yes, try it and I believe you can find the answer.” “OK! Let’s see. What’s […]

Numbers That Stay True To Themselves

July 23, 2022

“Do you know numbers that stay true to themselves?” I asked my son. “What do you mean?” “Let me give you an example. The number 25, if you multiply it by itself, what’s the result?” “625.” “The last two digits of 625 is 25. It is where we started! The number 25 stays true to […]

Love Like The Galaxy (星汉灿烂)

July 23, 2022

Recommendation: ⭐⭐⭐⭐⭐ Another big production debuting 2022! Premiering on Youtube as we speak (One episode everyday)! In Love like The Galaxy, Zhao lusi plays a girl whose parents had to leave her at the relatives while defending the country. Growing up desiring for love, she is smart, beautiful, yet not exactly following the rules … […]

Who Rules the World (且试天下)

July 23, 2022

Recommendation: ⭐⭐⭐⭐ Zhao lusi has risen to the rank of top tier actresses in China in recent years. She has several shows debuting this year. In Who Rules the World, she plays a princess who is also a Kunfu Master. The martial arts scenes in the show are pretty awesome. Show Title: Who Rules the […]

Why Do Computers Use Binary Numbers

July 16, 2022

This is the third episode of the Binary Numbers And Computers series. In Episode I, we introduced binary numbers, which are used by Computers. In Episode II, we explained why humans use decimal numbers. In this episode, we are going to dig a little deeper to see why binary numbers are so important to computers. […]

The Most Beautiful Number

June 28, 2022

Today we are introducing the most beautiful number! Her name is … drumbeat please…  φ (Pronounced fi, to rhyme with fly) So what is φ? It’s also called the Golden ratio. It’s represented by the Greek letter phi. This is called a Golden rectangle. The ratio of its length ( c ) to width ( […]

The Tower of Hanoi

May 28, 2022

Another fun story today! Legend has it that, on a pouring day in the nineteenth century, a French explorer entered a giant, splendid temple in Hanoi, the capital city of Vietnam. He saw three massive pillars. 64 golden disks stacked neatly on the pillars. Monks were busy moving the disks from one pillar to another. […]


December 25, 2021