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!
Why More Happy Couples Prefer to Sleep in Separate Beds
According to a survey, only 14% of couples sleep in separate beds every night. And while many of us might believe in the saying “couples who sleep apart grow apart” there are studies that show the opposite is actually true.
We at Bright Side believe that there are no wrong or right sleep arrangements, because to some, sleeping in different beds can be as pleasing as for others sharing a bed with their partner.
A poor night’s sleep can turn lovers into fighters.
According to research, sharing a bed with a partner that has restless sleep behavior can deprive you of 49 minutes of sleep each night. And, when one partner doesn’t get a proper night’s sleep because of the other, it will most likely result in a conflict between them the next day.
Actually, the study even confirmed that couples who tend to have a poor night’s sleep have more severe and more frequent fights than those who wake up well-rested. People who get a good night’s sleep, on the other hand, are more likely to be in a good mood, have lower stress levels, and be more patient.
Resenting your partner because you can’t get a good night’s sleep can be destructive to the relationship.
Snoring, fidgeting, and bed or blanket hogging are just a few of many reasons why some couples choose to sleep in different beds or even in different bedrooms. Lying awake listening to your partner snoring while you beat yourself up to fall asleep can lead to a build-up of anger, tension, and resentment toward your partner.
According to Jennifer Adams, author of Sleeping Apart Not Falling Apart, sleeping in a separate bedroom can even help a relationship thrive because both partners are not sleep deprived.
Each partner can tailor their sleeping conditions to their heart’s content.
Tina Cooper, a licensed social worker, sleeps in different bedrooms with her partner because of their opposite sleeping habits. “I’m a night owl, he’s an early bird. I need soothing sounds to fall asleep, and he likes silence. He likes a hard mattress, and I like soft and full of pillows. And because I don’t like the early day’s sunlight, my boyfriend gave me the master bedroom which gets less light and he has the second largest room that gets the sunrise he loves.”
How you spend the nighttime in your shared bedroom with your partner can also influence your daytime functioning, marital satisfaction, and psychological and physical health. And when 2 people with different bedtime preferences and nighttime schedules end up together, changing themselves just to please their partner’s needs might harm their relationship in the long run.
Sleeping in different bedrooms with your partner means that the 2 of you will have a place just for yourselves where you can relax after an exhausting day. This way, both of you can satisfy your needs without tiptoeing around and worrying about whether your partner might wake up because you want to watch the latest episode of your show before bed.
Even if you don’t remember waking up, disturbed sleep can have a negative impact on your overall health.
During the night, our brain cycles through the stages of sleep several times: light sleep, deep sleep, and REM (Rapid eye movement sleep). But when you interrupt the cycle by waking up during the night, it means that your brain spends more time in the light sleep stage and misses out on REM. And without sufficient REM your emotional well-being and cognitive performance suffer.
Interrupted sleep can also have short and long-term health consequences, like hypertension, weight-related issues, mental health problems, reduced quality of life, and other health-related issues.
People on Reddit share why they decided to sleep separately with their partner.
- “Because a good night’s sleep is more romantic than sharing a bed. I snore and toss and turn. He gives off literal village levels of heat in his sleep and I can’t stand the heat. I read, he can’t stand light. We keep different hours to an extent. A million reasons. We get along so much better this way.” — crankyweasels
- “My partner and I have completely separate bedrooms. We ’sleepover’ occasionally in each other’s rooms. However, we both sleep exponentially better apart. He’s a night owl and I’m an early bird. He wants only one sheet on him, I want 10 lbs of blankets. In addition, having a separate room allows me to decorate it however I want, have my own personal space, and keep it to the level of cleanliness I prefer. People look at us sideways when I mention the separate rooms thing, but it’s been a game-changer.” — eriasana
- “Different sleep cycles due to different work schedules. We are still madly in love and we both agreed to this because it’s the best for both of us.” — AFishInATank
- “Early in our relationship, 90% of our fights occurred in the bedroom. I like to sleep in a cold room with the fan on and white noise like a box fan. I also like to go to sleep with the TV on. She likes to sleep in a warm, still, cave in complete silence and darkness. We started sleeping in separate rooms and all of a sudden 90% of our fights stopped. Also, because we were getting real sleep, other fights turned more into heated discussions.” — ttc8420
What are your sleeping arrangements with your partner? Do you believe sleeping in different beds can help a relationship thrive?
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