Iva Sallay

#mathsonholiday Tessellating pentagons in Bucharest

We definitely approach these problems differently. I will have to look again to see why I thought I needed that last equation.

I’m going to #TryMathsLive with this problem from @findthefactors.bsky.social, created using @transum.bsky.social’s Digimoji, which was inspired by my game Digit Disguises.

I found your first puzzle easier to solve than your second puzzle, but I eventually was able to figure it out. I really like these puzzles a lot especially when only 8 or 9 equations are used. Can you solve mine? Digits -4, -3, -2, -1, 0, 1, 2, 3, 4 are disguised.

Digimoji Crack the emoji code by testing equations and spotting patterns.

Hello @davidkbutler.bsky.social - I had the urge to create (yet another) one-player online game/puzzle based on your Digit Disguises game. I have yet to try it out with students though.

www.transum.org/Maths/Puzzle...

Thanks so much for all the sharing you do. Have a great weekend!

I almost always do it sum first now. See this one: bsky.app/profile/davi...

I’m going to #TryMathsLive with this one from @howiehua.bsky.social. Let’s see…

How to convert into different bases:

New Knot Theory Discovery Overturns Long-Held Mathematical Assumption Mathematicians have unraveled a key conjecture about knot theory

Neat discovery: Two knots whose connected sum has an unknotting number less than the sum of the unknotting numbers of the knots. This provides a counterexample to an old conjecture.

MATHS TEACHERS: If you’re seeking ways to add quirky ‘real world’ maths to lessons next year I’ve updated my blog index robeastaway.com/blog/blog-in... .
You can use it to find odd applications of (say) quadratic equations. It’s the sort of thing you might use as a lesson starter (1/3) #TMiP25

Use 9 different factors of 126 in a 3 by 3 grid. The numbers in the top row add to 41. The numbers in the middle row add to 12. The numbers in the bottom row add to 49. The numbers in the left column add to 31. The numbers in the middle column add to 59. The numbers in the right column add to 12.

Start your week with this #yohaku. Fill in cells with 9 different factors of 126 to get totals shown in each row/column.
#mathsky #iTeachMath

Ranked: Countries With the Highest Wealth per Person in 2025 This visual compares the world's richest countries by their highest average and median wealth per person in 2025.

The huge difference between average and median wealth for the US is really telling.

www.visualcapitalist.com/wealth-per-p...

Investigating the question - how many questions does someone need to get right before you start to think it is unlikely that they are guessing? #AMSPSummerSchool

I was explaining to my Ukrainian colleague the phrase ‘There’s no such thing as a free lunch’. She told me the equivalent in Ukrainian is ‘The only free cheese is in the mousetrap’ - which is so much better

Math Meets Art My favorite day of the year has arrived.

New Alg2 student asked me at open house if we were going to do the “graph project”this year. He’s been in planning his art all summer! It’s amazing how excited students are about math! robinkubasiak.substack.com/p/math-meets.... @desmos.com

Mathematically, which of these numbers is the largest? Number of hours in a year, number of seconds in a day, number of days in a decade, number of minutes in a week.

I saw this math question on Who Wants To Be a Millionaire. Would you win $125,000? What would your strategy be?

The String and Rod Puzzle

#puzzle #puzzles #puzzleaday

90 Square Logic Puzzles - These magic square style puzzles will give your students plenty of mental math practice!

mathequalslove.net/90-square-lo...

#mtbos #iteachmath #puzzlingclassroom #logicpuzzles #edusky #mathsky

If we subtract all the digits from any number, we will always get a multiple of 9. Let's see why!

Someone asked me what my favorite mathematical operation is and I told them it has to be subtraction. I just like making a difference.

Cool fraction pattern: You can write a unit fraction as a sum of two distinct unit fractions, and we can do this mentally!

I remember learning about the associative property in school and remembered it was so boring, but it can help us with mental math!

A diagram of a right triangle with legs of 7 and 24 and a hypotenuse of 25.

Happy Pythagorean Triple Day to all who celebrate!

Can you visualize fraction division on the number line? If not, give me around 90 seconds to explain it.

Made me chuckle!

NEW Grade Level Tangram Puzzles for the First Week of School (Kindergarten through Ninth Grade)

mathequalslove.net/grade-level-...

#mtbos #iteachmath #puzzlingclassroom #mathsky #edusky #firstdayofschool #firstweekofschool

Fun fact: Pope Leo XIV earned a bachelors in mathematics before getting his masters of divinity.

The Book is Done!!! After five long years of writing, drawing, and formatting, I finally did it – I published my children’s book: A Very Variable Adventure: From Alphabet to Algebra. Hooray!!! Maybe now I’ll actually …

Now that I finished my book I have been extremely excited to explore new ideas with my blog.

Ironically, my first new post is . . . about my book. 😆

I'd love to know what you think:
anandonmath.wordpress.com/2025/04/10/t...

#MTBOS #iteachmath #edusky #Mathsky #STEMbooks #kidlit

So fun to meet one of your Bluesky friends in real life!
@findthefactors.bsky.social

#MtBos #iteachmath

Kansas and Arkansas

You've heard of tangent and arctangent but have you heard of

#math