Howie Hua
@howiehua.bsky.social
I teach math to future elementary school teachers at Fresno State. I make math memes and explainer videos. http://linktr.ee/howiehua
Did you know all prime numbers (besides 2 and 3) are all one away from a multiple of 6? Here's how we can show this.
December 6, 2025 at 5:10 PM
Did you know all prime numbers (besides 2 and 3) are all one away from a multiple of 6? Here's how we can show this.
How many positive factors does 20²⁵ have?
December 4, 2025 at 4:12 PM
How many positive factors does 20²⁵ have?
If it takes Elmo 6 minutes to build a snowman and Rocco 7 minutes to build a snowman, how fast can they build a snowman if they worked together?
December 3, 2025 at 5:33 PM
If it takes Elmo 6 minutes to build a snowman and Rocco 7 minutes to build a snowman, how fast can they build a snowman if they worked together?
Why do we flip the inequality sign when we multiply or divide by -1?
December 3, 2025 at 12:16 AM
Why do we flip the inequality sign when we multiply or divide by -1?
It's Mental Math Monday with @mikeflynn55.bsky.social. How would you mentally calculate 88×8 without using any 8s?
December 1, 2025 at 4:43 PM
It's Mental Math Monday with @mikeflynn55.bsky.social. How would you mentally calculate 88×8 without using any 8s?
Tonight's trick toss
December 1, 2025 at 12:11 AM
Tonight's trick toss
1+3+5+7+... will always equal a square number. Here's an example of a proof by induction.
November 30, 2025 at 5:03 PM
1+3+5+7+... will always equal a square number. Here's an example of a proof by induction.
You drive 30 mph going to Culver's. How fast do you need to drive back to have an overall average speed of 60mph?
November 29, 2025 at 4:11 PM
You drive 30 mph going to Culver's. How fast do you need to drive back to have an overall average speed of 60mph?
Since it's Black Friday, let's learn how to visualize percentage problems. If a pair of shoes is $120 after a 20% discount, what was the original price of the pair of shoes?
November 28, 2025 at 3:27 PM
Since it's Black Friday, let's learn how to visualize percentage problems. If a pair of shoes is $120 after a 20% discount, what was the original price of the pair of shoes?
Happy Thanksgiving! How many different ways can 6 people sit at a table?
November 27, 2025 at 3:08 PM
Happy Thanksgiving! How many different ways can 6 people sit at a table?
Tonight's trick toss: Can I catch without looking?
November 25, 2025 at 1:27 AM
Tonight's trick toss: Can I catch without looking?
It's Mental Math Monday! Pam Harris from Math is Figureoutable wants to know how you would mentally calculate 15×36. Please share how you would do it in the comments.
November 24, 2025 at 4:24 PM
It's Mental Math Monday! Pam Harris from Math is Figureoutable wants to know how you would mentally calculate 15×36. Please share how you would do it in the comments.
Happy Fibonacci Day! You can find today's date, 11/23, in the Fibonacci sequence.
November 23, 2025 at 5:12 PM
Happy Fibonacci Day! You can find today's date, 11/23, in the Fibonacci sequence.
I got a request to do 500÷12 rounded to the nearest hundredth. Any other requests?
November 23, 2025 at 4:06 PM
I got a request to do 500÷12 rounded to the nearest hundredth. Any other requests?
Can you find the three fastest rats in the fewest number of races?
November 22, 2025 at 3:07 PM
Can you find the three fastest rats in the fewest number of races?
How many triangles can we make on a 3×3 array of dots?
November 21, 2025 at 4:22 PM
How many triangles can we make on a 3×3 array of dots?
I was wrong a couple times in my last video. Today I learned that "minus" is a preposition and NOT a verb.
It makes sense though, like "I like your outfit, minus the shoes."
It makes sense though, like "I like your outfit, minus the shoes."
November 20, 2025 at 7:49 PM
I was wrong a couple times in my last video. Today I learned that "minus" is a preposition and NOT a verb.
It makes sense though, like "I like your outfit, minus the shoes."
It makes sense though, like "I like your outfit, minus the shoes."
- and - mean different things, and if we understand that one is a verb and the other is an adjective, we can better understand integer subtraction
November 19, 2025 at 8:42 PM
- and - mean different things, and if we understand that one is a verb and the other is an adjective, we can better understand integer subtraction
Don't make this mistake when subtracting
November 18, 2025 at 7:06 PM
Don't make this mistake when subtracting
It's Mental Math Monday with guest Ramon from Spain. How would you mentally calculate 73-37?
November 17, 2025 at 4:10 PM
It's Mental Math Monday with guest Ramon from Spain. How would you mentally calculate 73-37?
What is in the ones place when we evaluate 67⁴¹?
November 16, 2025 at 6:33 PM
What is in the ones place when we evaluate 67⁴¹?