We all love a good brain teaser, especially when it involves math—whether we admit it or not. A tricky math problem recently went viral, leaving the internet divided and proving once again that even simple-looking equations can be deceptive.
My Math Struggles & A Challenge
Here’s a quick personal anecdote: I recently started preparing for the GRE and realized that I hadn’t taken a formal math class in nearly nine years. Confidence? Gone. My quantitative reasoning skills? Rusty at best. So, I decided to brush up by taking online high school math courses, starting from the absolute basics.
When I came across this viral math puzzle that was stumping the internet, I thought, “This is my moment! Let’s see if I still have my 9th-grade math chops!” Spoiler: I did not.
The Viral Math Puzzle Taking the Internet by Storm
The problem originally surfaced in Japan, where researchers found that only 60% of people in their 20s managed to solve it correctly. It quickly spread online, turning into yet another viral challenge because, apparently, we love testing our brains with tricky equations (or we just enjoy arguing over the answers).
At first glance, the problem looks simple. But the devil is in the details. My gut told me there was some sort of trick involved—it seemed too easy. However, instead of embarrassing myself by attempting it publicly, I turned to the internet for guidance. If there’s one thing I’ve learned, it’s that someone, somewhere, has already tackled your problem and made an instructional video about it. So, I spent my morning watching people do math on YouTube. Exciting stuff.
The Math Problem:
6 ÷ 2(1 + 2) = ?
Go ahead, solve it. I’ll wait.
Video : Viral problem from Japan
Common Wrong Answers
If you got 1 or 9, you’re not alone. Many people arrived at these answers because of a little acronym called PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction).
You may remember PEMDAS from school—or perhaps the mnemonic “Please Excuse My Dear Aunt Sally.” The rule dictates that you must solve problems in this specific order:
- Parentheses
- Exponents
- Multiplication & Division (from left to right)
- Addition & Subtraction (from left to right)
So, following PEMDAS, some people calculated it as:
- Solve inside the parentheses: (1 + 2) = 3
- Rewrite the problem: 6 ÷ 2(3)
- Some then treated 2(3) as a single term and multiplied first: 6 ÷ 6 = 1
However, others applied division before multiplication:
- 6 ÷ 2 = 3
- Then, 3 × 3 = 9
Both groups were confident in their logic, but only one approach was correct.
The Correct Answer
The correct answer is 9. Here’s why:
Step 1: Solve the Parentheses First
(1 + 2) = 3
Now the equation is rewritten as:
6 ÷ 2(3)
Step 2: Follow the Order of Operations
According to PEMDAS, division and multiplication are performed from left to right (since they share the same level of priority in the hierarchy).
- 6 ÷ 2 = 3
- 3 × 3 = 9
Wait… Isn’t the Answer 1?
Some people argue that implicit multiplication (like 2(3)) takes precedence over division. However, modern mathematical notation treats multiplication and division equally. Since they appear side by side in the equation, we solve left to right.
If the equation had been written as:
6 ÷ (2 × 3)
Then, you would multiply first and get:
6 ÷ 6 = 1
But because the given equation lacks parentheses around 2(3), the correct answer remains 9.
Why People Get It Wrong
The confusion stems from different ways of interpreting notation and how we were taught order of operations. In some older textbooks, implicit multiplication (like 2(3)) was given higher priority than division, leading to the alternative answer of 1. However, under modern mathematical conventions, division and multiplication hold equal weight and should be solved left to right.
Video : 13 Riddles That Are Trickier Than They Seem
Math Rules Are Not Always Universal
Believe it or not, different countries and academic institutions teach math slightly differently. Some older math textbooks might suggest treating multiplication next to parentheses as having higher priority, while others follow the standard left-to-right rule. This is why debates like this never really die down—people were simply taught different methods!
How to Avoid Future Math Confusion
- Always follow the standard order of operations – PEMDAS (or BODMAS, if you learned it that way).
- If in doubt, add brackets – Parentheses make everything clearer and help prevent confusion.
- Be consistent – If you’re solving problems with others, use the same approach so that everyone gets the same answer.
- Check multiple sources – Sometimes, even textbooks disagree. Looking at different explanations can help clarify tricky concepts.
Final Thoughts
This viral math problem is a perfect example of how simple-looking equations can spark endless debate. The way you approach it depends on how you learned math, but if you apply PEMDAS correctly, the answer is 9—at least according to current conventions.
So, did you get it right, or are you questioning everything you thought you knew about math? Either way, at least we can all agree that math is a lot trickier than it looks!
The Forgotten Tools of Typing: Typewriter Eraser Brushes
Do Typewriter Eraser Brushes Exist?
The image depicts round objects that are typewriter erasers, which were packaged with a little brush. The erasers were composed of supple materials such as rubber, frequently combined with fine abrasives. This mixture was created to eliminate typewriter ribbon marks or ink from paper, which was the main way to fix errors in a typewritten text before digital editing or white-out were introduced.
After removing a letter or word from the paper, the tool’s tiny brush was used to carefully brush away the eraser residue that remained on it. During the era when typewriters dominated both the business and literary domains, these instruments were indispensable for upholding orderly and polished work.
A Moment in Time: The Days When Eraser Brushes Were Crucial
Typewriter eraser brushes were as ubiquitous in the early to mid-1900s as correction fluid or computerized backspace buttons are in the modern era. Because typing errors were unavoidable no matter how careful one was, every typist had one on their desk. With the use of these tools, errors might be fixed without having to start over with a completely new page.
Several sheets of paper could have to be fixed due to the widespread use of carbon paper for copying back then. Eraser brushes worked well to erase the incorrect marks without causing any tearing of the fragile material.
The Era of Typewriters’ Decline
Typewriters were quickly rendered obsolete with the advent of word processors and subsequently personal computers. As instantaneous editing became possible with digital text, the necessity for such specialized erasers diminished. These erasers have become rare artifacts from a bygone era when typing was a talent and an art.
The world of writing and editing has changed so much that seeing one of these erasing brushes now brings back memories for those who used them. There has never been a truer statement than “times have changed,” particularly when contrasting the difficulties of erasing a typewritten text with the simplicity of the undo button on contemporary technology.
A Unique Collectible
In the modern era, typewriter eraser brushes are prized collections. They are valued for their simplicity and efficacy by vintage enthusiasts and fans of retro office supplies. As a tribute to the inventiveness of earlier generations and the unusual equipment that formerly supported daily chores, they may appear out of place in a world where digital devices rule.
In summary, from indispensable to outdated
The image’s tools could appear strange or even antiquated to individuals who have never used a typewriter. Older generations, however, associate them with the constant presence of an eraser brush next to the keyboard, the scent of ink ribbons, and the steady clacking of typewriter keys. It is undeniable that times have changed, and like many advancements, what was once indispensable now quietly lies in the annals of history.
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