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!
Police K9 dies after being left in hot vehicle after air conditioner malfunction
It’s crucial now more than ever to keep an eye out for dogs left in hot automobiles because summer is still going strong and temperatures are rising to record levels in many places.
Dogs who are left in hot cars will not survive for long due to their severe susceptibility to heat stroke. Accidents can still occur even if you believe you have done all the necessary safety measures to avert catastrophe.
That was the unfortunate situation that occurred recently when a police department K9 was left in a hot car without air conditioning and without emergency procedures in place, leading to his death.
Vader, a 4-year-old K9 with the Arnold Police agency in Missouri, passed away on July 31 from heat exhaustion, according to a press release from the agency.
Vader was left in a running patrol car with the air conditioner running, according to the department, which referred to this as a “necessary and common practice” for K9s who are not actively participating in police operations.
Officers found that the air conditioning system had broken down when they got back inside the car.
The police added that although all of their K9 patrol cars have a failsafe mechanism that sounds the horn, pulls down the windows, warns the handler, and triggers the alarms and sirens if the vehicle reaches a particular temperature, this emergency backup “failed to activate.”
After being taken to the veterinary facility in a hurry, Vader appeared to be improving, but he eventually passed away.
The Arnold Police Department posted, “Unfortunately, we learned last night that there were no further treatments available for Vader and he succumbed to his injuries.”
“Investigating this tragedy to determine what went wrong,” the department wrote in a letter. They also requested that people remember Vader’s handler and his family in their prayers and expressed their sorrow over his passing.
Understandably, the public has been devastated by the news and has experienced strong emotions; many have wondered if more might have been done to avert this disaster.
On Facebook, someone said, “Take the dog with you, just like a child. Common practice needs to change.”
For that reason alone, another person remarked, “These dogs should never be left in a car for an extended period of time, running or not.” “I know it was an accident, but nobody else should have to go through this.”
Others recommended enhancing or testing the emergency heat alarm system of the cars more frequently because it did not sound.
Vader is sadly not the only police dog to pass away after being left in a hot car; sadly, this happens frequently due to either officer negligence or—in this case—a malfunctioning air conditioner and backup system.
Horus, a second Missouri police dog, also passed away after being left in a hot car overnight, a few days before Vader did.
It is terrible that police dogs could suffer and even perish from a hot car since they put their lives in danger for their communities. Although emergency warnings and air conditioning are features of patrol cars, it is obvious that these devices are not infallible.
We hope that Vader’s untimely passing and the deaths of all the other K9 victims will spur more measures to safeguard their lives. 
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