The Pharaoh’s Treasure: Historical Puzzles

Eratosthenes teaching in Alexandria

When two non-mathematicians meet on the street and one says, “I’ve got problems,” the other answers, “I’m so sorry for you.”

    When two mathematicians meet and one says, “I’ve got problems,” the other says, “Oh, goody!”

    —Herta Taussig Freitag

    Whenever you get a group of mathematicians together, at least one of them will suggest a puzzle to play with. This is how mathematics grows, puzzle upon puzzle, generation after generation.

    And since human nature hasn’t changed, we know that the same thing happened in the ancient Ptolemaic Egyptian of Alexandria.

    So let’s explore a few of the math stumpers that enchanted those old Greek scholars…

    Continue reading The Pharaoh’s Treasure: Historical Puzzles

    Thinking Thursday: Gian-Carlo Rota

    Thinking Thursday math journal prompt

    Writing to Learn Math: What did the author mean? Put the thought in your own words. Do you agree or disagree? Why?

    Do you want your children to develop the ability to reason creatively and figure out things on their own?

    Help kids practice slowing down and taking the time to fully comprehend a math topic or problem-solving situation with these classic tools of learning: Notice. Wonder. Create.

    Continue reading Thinking Thursday: Gian-Carlo Rota

    How to Teach Math: 3 Goals for This Homeschool Year

    Young girl studying

    “It is the supreme art of the teacher to awaken joy in creative expression and knowledge.”

    —Albert Einstein

    Whenever a new set of test results comes in, society goes through a new cycle of hand- wringing and blame-casting. The most current PISA results are no different. The best analysis I’ve seen: The Sky Is Always Falling by Bill McCallum.

    Rather than join that fray, let’s step back and ask a bigger question: What do we want for our children?

    Why do we school our kids? What does it mean to be “educated”? And in particular, why do we teach math? What do we hope to achieve?

    We can’t think rationally about how to teach until we are clear about our goals.

    What’s Your Priority?

    • Do you want to produce good test-takers, children who know how to follow instructions and work efficiently?
    • Or do you care less about efficiency and more about curiosity? Do you want students who enjoy wondering about concepts and are eager to learn more?
    • Or maybe you want problem-solvers, students who can step into an unfamiliar situation and figure it out?

    Can we choose option D, all of the above? Is it possible to work toward all these goals at once, to build solid knowledge and teach mathematical skills while at the same time encouraging curiosity and developing flexible thinking?

    Like a toddler throwing a tantrum, I want it all, and I want it right now.

    I don’t know how to solve the problems of classroom schooling, but here’s some advice for my fellow home schoolers.

    This school year…

    (1) Build Problem-Solving Skills

    Whatever math curriculum you use, focus math lessons on your child’s own thinking.

    Rather than telling them what to do, ask about what they know. Help children find a way to use what they’ve already learned to reason about the new topic.

    Consider doing your math lessons buddy-style:

    And when your children get stuck, follow the tips in my “If Not Methods” blog series:

    (2) Practice for Fluency

    Reinforce learning with creative practice.

    Don’t just memorize facts, but use them in a variety of ways. Build mental math skills by playing math games, especially games that require strategic use of math skills.

    Check out my blog for ideas:

    (3) Explore Non-Textbook Math

    Encourage curiosity through puzzles, enrichment activities, reading good books, playing with math art, and journaling.

    For example:

    • Learning Math with Puzzles
      As stories are to history or science, puzzles are to math.
    • Make Your Own Nim Games
      Mathematicians enjoy studying patterns, whether they are patterns within our system of numbers or patterns of shapes or of abstract ideas.
    • Living Books for Math
      Here are a few of my favorite books of playful, living math, both old and new.
    • Discover Math in Art
      Art lets children experiment with lines, curves, shapes and symmetries, exploring a wide range of mathematical structures and relationships.
    • The Creative Way To Help Your Kids Learn Math
      When you embrace this adventure of learning math through playful exploration, you’ll be surprised how much fun thinking hard can be.

    “How to Teach Math” copyright © 2026 by Denise Gaskins. Image at the top of the blog copyright © Wavebreakmedia / Depositphotos.

    Are you looking for more creative ways to play math with your kids? Check out all my books, printable activities, and cool mathy merch at Denise Gaskins’ Playful Math Store. Or join my free email newsletter on Substack.

    This blog is reader-supported. If you’d like to help fund the blog on an ongoing basis, then please join me on Patreon (or choose the paid level on Substack) for mathy inspiration, tips, and an ever-growing archive of printable activities.

    The Pharaoh’s Treasure: Historical Tidbits

    archeology site beside Egyptian pyramids

    “In most sciences, one generation tears down what another has built, and what one has established another undoes. In mathematics alone, each generation adds a new story to the old structure.”

    —Hermann Hankel

    In my old snail-mail Mathematical Adventures newsletter, I used to squeeze bits and snippets into the margins. Quotations, historical tidbits, and small puzzles tangentially related to the main story.

    These marginal notes were not simply decoration. Rather, they served the same purpose as the small bumps on a Lego brick, connections on which to build a greater understanding of the world of math.

    Thinking about how other people have explored the world of mathematics in the past can offer us new ways of looking at, the things we’re learning today.

    Besides, math history is just plain interesting. After all, it’s the story of people just like us, people who wondered, fought, loved, grieved, and lived rich lives—and who played around with math puzzles that we can still enjoy today.

    The internet flows like water, however, adjusting content to fit your screen size, which means it doesn’t really have margins to fill. But that’s fine, because it lets me expand the tidbits into a post of their own and include links for further research. You can enjoy my bits and bobs, and then click through to explore on your own.

    So let’s turn the clock back a couple thousand years and see what we can find…

    Continue reading The Pharaoh’s Treasure: Historical Tidbits

    Thinking Thursday: Eleanor Roosevelt

    Thinking Thursday math journal prompt

    Writing to Learn Math: What did the author mean? Put the thought in your own words. Do you agree or disagree? Why?

    Do you want your children to develop the ability to reason creatively and figure out things on their own?

    Help kids practice slowing down and taking the time to fully comprehend a math topic or problem-solving situation with these classic tools of learning: Notice. Wonder. Create.

    Continue reading Thinking Thursday: Eleanor Roosevelt

    Reasoning about Ratios and Proportions

    photo of sailboat on the Nile river

    “The value of a problem is not so much coming up with the answer as in the ideas and attempted ideas it forces on the would-be solver.”

    —I. N. Herstein

    Whenever I give a problem or puzzle in an Alexandria Jones story, I’ll try to post the answer soon afterward.

    But don’t peek!

    In the old days of my snail mail newsletters, the answers always came in the next issue, so students had two months to let the puzzle ruminate without temptation.

    After all, if you only read the answer I give, you miss out on the fun of solving the puzzle. Follow the Math Adventurer’s Rule:

    • Figure it out for yourself!

    Give the problem a good workout on your own. See what you can notice about the puzzle. Wonder about how it connects to the larger world of mathematics.

    Play with the ideas and find out where they may lead.

    Then check the answer just to prove you got it right, and maybe to see whether we did it the same way. There’s always more than one way to approach any math problem, and each method offers its own insights.

    Continue reading Reasoning about Ratios and Proportions

    The Pharaoh’s Treasure, Part 2

    photo of Egyptian sphinx

    “One factor that has remained constant through all the twists and turns of the history of physical science is the decisive importance of the mathematical imagination.”

    —Freeman Dyson

    In the previous episode, Alexandria Jones discovered a mysterious treasure: three wooden sticks, like tent pegs, and a long loop of rope with 12 evenly spaced knots. Her father explained that it was an ancient Egyptian surveyor’s tool, used to mark right angles.

    loop of rope and 3 pegs

    Continue reading The Pharaoh’s Treasure, Part 2

    Cat Quotations

    painting of children with kittens

    And now for something completely different…

    The intrepid Quote Investigator played around with math recently:

    “You know, people think that mathematics is complicated. Mathematics is the simple bit. It’s the stuff we can understand. It’s cats that are complicated.”

    —John Horton Conway

    It reminded me of one of my favorite homeschooling exercises:

    • I would write out a short paragraph, all lower-case with no punctuation (and usually including some misspellings and grammar errors) on a whiteboard.
    • Then my children took turns marking the passage like editors correcting my work.

    One of these exercises was a series of short quotations about cats, which my youngest daughter loved.

    So in today’s post, I’ve put together an editing exercise you can share with your children, along with several links for playing with mathematical cats.

    Enjoy!

    Continue reading Cat Quotations

    Tasty Treats from the Moscow Puzzles

    basket of apples

    “Problems stressing deduction rather than calculation have a special appeal and value. They teach you to analyze, and to seek unorthodox ways of solving a problem.”

    —Boris Kordemsky

    Today I’m sharing a few treats from The Moscow Puzzles by Boris Kordemsky, which mixes classic brainteasers and original stumpers.

    Recreational math expert Martin Gardner called Kordemsky’s book “the outstanding puzzle collection in the history of Russian mathematics.”

    Have fun playing logic with your kids!

    Continue reading Tasty Treats from the Moscow Puzzles

    Playful Math 184: Carnival of Living Math

    Playful Math Carnival 184

    Welcome to the 184th edition of the Playful Math Education Blog Carnival — a smorgasbord of delectable tidbits of mathy fun. It’s like a free online magazine devoted to learning, teaching, and playing around with math from preschool to high school.

    With all the links, a blog carnival can feel overwhelming. Bookmark this article, so you can take your time reading the posts.

    “Living math” means bringing our children face-to-face with the big ideas of mathematics to help them develop their reasoning skills. When the ideas of math come to life for our children, their minds delight in seeing how numbers and shapes connect to each other and exploring these relationships.

    Scattered between the playful math links below, you’ll find quotations from my new book Charlotte Mason’s Living Math, along with several paintings of children playing and learning which I considered for the book but ran out of room.

    “The lesson” by Rafael Frederico, 1895.

    By tradition, we start the carnival with a puzzle/activity in honor of our 184th edition. But if you’d rather jump straight to our featured blog posts, click here to see the Table of Contents.

    Continue reading Playful Math 184: Carnival of Living Math