Have you ever come across a math problem that seems easy at first glance, only to realize that most people get it wrong? The equation 9 – 9 ÷ 9 + 9 – 9 ÷ 9 = ? is one such puzzle that confuses many. It looks simple, but if you’re not careful, you might end up with the wrong answer.
Are you ready to put your math skills to the test? Take a moment to solve it before reading ahead. Think you got it right? Let’s find out!
Why Do So Many People Get This Wrong?
At first glance, this equation appears straightforward. However, small details in mathematical rules trip people up. Here are some common mistakes that lead to the wrong answer:
- Ignoring the Order of Operations (PEMDAS/BODMAS) – Many people solve the problem from left to right without following the correct order of operations.
- Misplacing Parentheses (Even When They Aren’t Written) – Some assume parentheses where there are none, changing how they approach division and subtraction.
- Rushing Through the Calculation – The problem is designed to look easy, so people tend to solve it quickly and overlook critical steps.
So, what’s the correct approach? Let’s break it down step by step.
Step-by-Step Solution
To solve this equation correctly, we must follow the order of operations. The most commonly used rule is PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).
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The given equation:
9 – 9 ÷ 9 + 9 – 9 ÷ 9
Step 1: Solve the Division First
According to PEMDAS, division comes before subtraction and addition. So, let’s divide first:
- 9÷9=19 ÷ 9 = 19÷9=1
- 9÷9=19 ÷ 9 = 19÷9=1
Now, substitute these values back into the equation:
9 – 1 + 9 – 1
Step 2: Perform Addition and Subtraction from Left to Right
Now, we calculate in order from left to right:
- 9 – 1 = 8
- 8 + 9 = 17
- 17 – 1 = 16
So, the correct answer is: 16
Common Incorrect Answers and Why They Happen
Many people arrive at incorrect answers because they don’t follow the correct order of operations. Here are some of the most common mistakes:
- Answer: 0 – This happens when someone groups all the numbers together without following PEMDAS, incorrectly simplifying the problem as:
9−9−9+9−9=09 – 9 – 9 + 9 – 9 = 09−9−9+9−9=0 - Answer: 1 – Some mistakenly subtract 9 from itself first before dividing, leading to:
(9−9)÷9+9−9÷9=1(9 – 9) ÷ 9 + 9 – 9 ÷ 9 = 1(9−9)÷9+9−9÷9=1
These errors reinforce the importance of following the correct mathematical rules step by step.
Why Understanding Order of Operations Matters
You might wonder—why does it even matter? Well, mathematics is built on logical rules, and following them correctly ensures we get consistent, accurate answers. The order of operations is used in everything from programming to engineering to everyday calculations.
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Think about it this way: If a recipe tells you to bake a cake at 350°F for 30 minutes before adding frosting, you wouldn’t reverse the steps, right? Math works the same way—sequence matters!
Put Your Skills to the Test
Did you get the correct answer? Share your response in the comments! Were you surprised by how easy it was to make a mistake?
If you enjoy solving puzzles like this, challenge your friends and see if they can get it right! Math riddles help improve problem-solving skills and boost logical thinking.
Want more brain teasers like this? Keep testing yourself with tricky puzzles and improve your critical thinking skills! Who knows? The next time you see a math problem like this, you might be among the 10% who get it right on the first try!
I Took My Boyfriend to Meet My Parents — When My Father Saw Him He Immediately Called the Cops
I had been waiting for this moment for several months. Lewis took the day off to meet my parents. We had been officially dating for three months, but he kept telling me he was too busy with work to meet them. As it turned out, that was all a lie, and he wasn’t working as a mechanic.
When we entered the house and my parents first saw Lewis, I noticed my dad’s expression drastically change. I wasn’t prepared for what happened next.My dad, always the gracious host, invited Lewis to take a tour of the house, starting with the basement. I watched them walk down the stairs, thinking my dad was just trying to make Lewis feel welcome. But as soon as Lewis stepped inside, my father immediately slammed the door, locked it, and started calling the police.“He’s not really Lewis,” my dad shouted into the phone, “he’s actually an escaped convict named Jack Riley!”I was in shock. “Dad, what are you talking about?”My father, his voice stern and filled with authority, looked at me with a mixture of concern and anger. “Emma, I recognized him the moment I saw him. I never forget a face. Years ago, when I was still in the force, Jack Riley was one of the most wanted men. He was convicted of fraud, theft, and numerous other crimes. He escaped from prison and has been on the run ever since.”My mind was racing. I thought back to all the moments with Lewis—his mysterious absence from work, his reluctance to meet my family, the way he always seemed to avoid talking about his past. It all started to make sense.As we waited for the police to arrive, I could hear Lewis—or Jack—banging on the basement door, shouting for me to let him out. “Emma, please, this is a mistake! Your father is wrong!”But the look on my dad’s face told me otherwise. He had never been wrong about something like this before.The police arrived quickly, and within minutes, they had Lewis in handcuffs. One of the officers confirmed my father’s story. “We’ve been looking for Jack Riley for years. Good catch, sir.”I stood there, numb, as they took Lewis away. The man I thought I loved, the man I had trusted, was a criminal. My heart ached with betrayal and confusion.As the police car drove off, my dad put his arm around me. “I’m sorry you had to go through this, Emma. But it’s better you found out now rather than later.”In the days that followed, the reality of the situation sank in. I learned more about Jack’s criminal past and felt grateful for my father’s vigilance and quick thinking. It was a harsh lesson about trust and the importance of truly knowing the people we let into our lives.Ultimately, I realized how lucky I was to have a father who cared so deeply about my well-being. The experience brought us closer, and I knew I could always rely on him to protect me, no matter what.As I moved on from the shock and heartache, I took comfort in knowing that my father had saved me from a much worse fate. It was a painful but valuable lesson in love and trust.
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