Chang's Math blog
Compilation of math questions by pupils
Thursday, June 26, 2025
Pentagon Pattern
Take a look! 📌
Found this on Pinterest
pin.it
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Sunday, June 22, 2025
Diagonals are expressed as surds!
Take a look! 📌
Found this on Pinterest
pin.it
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Law of Sines
The law of sines #trigonometry
EE Animations (@eeanimation) on Threads
threads.com
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Wednesday, June 18, 2025
Graphical proof of trigo identity
Mathematics Tutor/Teacher on Instagram
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Important to have enough sleep before an exam
The University of Oxford on Instagram: "A night of sleep can increase your capacity to solve problems 📈 Prof Russell Foster explains why it's so important to sleep the night before an exam! #ExamSeason #StudyTips #OxfordResearch"
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Monday, June 16, 2025
Appreciating equations involving circles
Take a look! 📌
How to graph a circle
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Irrational numbers — pi, e, golden ratio
matesunidas on Instagram: "🔢🧮 Los #números π (pi), raíz de 2, e y la proporción áurea (o número de oro) son ejemplos de irracionales muy importantes en #matemáticas. Proporciono en este reel una cantidad notable de decimales y una forma de calcularlos. 🔢🧮 The #numbers π (pi), square root of 2, e, and the golden ratio are examples of very important irrational numbers in #mathematics. I provide in this reel a notable amount of decimals and a way to calculate them. #numerosirracionales #irrationalnumbers #succession #sucesion #numberpi #numeropi #goldenratio #proporcionaurea #numerodeoro #math #maths #matematica #matematicas #realnumbers #numerosreales #visual #euler #learn #limit #limite #infinito #infinite #ingenieria #universidad #university #college"
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Saturday, June 14, 2025
…Same as circumference of the Big circle!
Take a look! 📌
Found this on Pinterest
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What is the Math behind this beautiful animation?— distance, speed. time, multiples
matesunidas on Instagram: "🟦 ¡¡Disfruta de esta #animación de #bolitas sobre #polígonos #regulares!! 😍 🟨 Enjoy this #animation of #balls on regular #polygons!! ❤️🔥 #visual #art #arte #sincronización #synchro #geometria #geometry #beautyful #relax #loop #bucle"
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Divisibility Tests of 1 to 10
Math Animations on Instagram: "Divisibility rules give you a quick way to see whether a number can be divided by a small integer without actually doing the division. For two you simply look at the final digit and if it is even then the whole number is even. For three you add all the digits and if that total divides by three then so does the original number. To test for four you treat the last two digits as their own number and see whether that divides by four. Five is even simpler: any number ending in zero or five will divide by five without a remainder. When you want to check six you apply the rules for two and three – a number that meets both will divide by six. The rule for seven asks you to double the last digit and subtract it from the number formed by the remaining digits; if that result divides by seven then the original number does too. For eight you look at the last three digits and see if they divide by eight. Nine works like three but with nine instead – if the sum of the
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Friday, June 13, 2025
What is the saddest Math story? 🥺 😢😭😢
the calculus guy on Instagram: "#related Please follow @the_calculusguy"
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What fraction of the square is shaded?
Chang Cheng Liang on Instagram
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Spot the errors! — mistakes made during a math exam ><
Math Animations on Instagram: "Attention, there are errors. Explore math with us: @math.animations @math.animations.basic.calculus @math.animations.calculus @math.animations.basic.algebra @math.animations.algebra @math.animations.basic.geometry #math"
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The Honeycomb Pattern
Game to give this problem a try?
Resist flipping to 2nd page
Chang Cheng Liang on Instagram: "#pattern #patterns"
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how Fischer measured the speed of light
Fact Fusion on Instagram: "The Man who measured the speed of light was a Genius . . . #factfusion #secret #science #facts #genius #light #speed #speedoflight #viral"
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Thursday, June 12, 2025
shortcut to double-digit multiplication? does it always work?
Differences between Korean and Chinese Math
Facts (@thecompletefacts) on Threads
threads.com
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Wednesday, June 11, 2025
What is so special about e , Euler’s number
What's so special about Euler's number e? | Chapter 5, Essence of ...
app.goo.gl
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Activity for factors and multiples
https://www.instagram.com/reel/DKrRr3XqqtG/?igsh=MWhzMGxja3BrdzFscQ==
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Tuesday, June 10, 2025
Cutting sides vs cutting corners( 口怕凹,不怕凸)
PSLE pie charts
Square grid vs Isometric grid
Square grids
Monday, June 9, 2025
A brilliant mobius wind kinetic structure
A brilliant Möbius wind kinetic sculpture [📹 Zack Fresco]
Đặng Huy Hoàng (@family.18112016) on Threads
threads.com
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Saturday, June 7, 2025
Logarithm Rules
MA - Basic Algebra on Instagram: "The logarithm is a mathematical concept that represents the inverse of the exponential function. It answers the question of what power a given base needs to yield a certain number. This principle makes it an important tool for analyzing exponential growth or decay processes that occur in science, technology, and economics. In addition, the logarithm facilitates complex calculations because it converts multiplication into addition and exponentiation into multiplication. This led to the historical development of logarithm tables, which were indispensable before the spread of modern computers. Its versatile applications range from solving exponential equations to studying scales such as the decibel or Richter scale to analyzing data in statistics and computer science. Explore math with us: @math.animations @math.animations.basic.calculus @math.animations.calculus @math.animations.basic.algebra @math.animations.algebra @math.animations.basic.geometry #m
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Thursday, June 5, 2025
Why are prime numbers so important
QuantMarkov on Instagram: "🧠 Why Are Prime Numbers So Important? 🔹 1. Building Blocks of Numbers Every number is made from primes! Just like atoms build matter, primes build all natural numbers. 🔹 2. Unbreakable Patterns They don't follow easy rules—making them mysterious and fascinating for mathematicians. 🔹 3. Backbone of Cryptography 🔐 Your online banking, passwords, and data security rely on the difficulty of factoring large primes. 🔹 4. Used in Nature & Tech From sunflower spirals to signal processing—primes are everywhere. 🔹 5. Quant Finance 💹 Primes help in creating pseudo-random number generators, essential for Monte Carlo simulations in option pricing and risk models. 🔹 6. Infinite & Irregular There are infinitely many primes, but no formula predicts them all. That's why they're still being studied! ✨ Prime numbers aren't just math—they're magic hiding in plain sight. #crypto #cryptocurrency #bitcoin #blockchain #ethereum #cryptotrading #university #wallstreet
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Wednesday, June 4, 2025
diagonal of square = length of rectangular pouch…
How do you fit this square perfectly into the bag
Royce Inyang (@royce231) on Threads
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