Challenge: Can you solve this math problem for middle schoolers – without a calculator?
Classic brain training methods are perhaps puzzles like crosswords or sudoku, but I have recently become more attracted to the type of challenge you’ll see below.
These puzzles have been flooding the web lately, probably because they are really fun!
These are old classic mathematical problems. When you were in middle or high school.
These math problems are more fun when you find yourself trying to remember the math you learned as a child.
Can you figure out the correct solution?
Here is the challenge, in the picture below.
At the top of the picture, we see the task and then four possible answers.
Which solution do you think is the correct one?
How did you come up with it?
Take your time and think about it to find the correct solution.
Done? Below you can check if you picked the right number!
A
B
C
The correct answer
The correct answer is B: 12.
Why is 12 the correct answer?
Well, if you remember from your school days, according to the order of operations, you do multiplication before addition and subtraction, so you start by solving 3 x 3, which results in 9.
Then we are left with a simpler math problem: 3 + 9 – 3 + 3
The answer is therefore 12.
Did you pick the correct number? Congratulations!
Crews discovered a huge shipwreck underneath the foundations of the World Trade Center Towers after 9/11
Following the finding, archaeologists were left scratching their heads.
When crews responding to the September 11 terrorist attacks discovered a shipwreck, they were astounded.
The World Trade Center terrorist attack site was still being excavated in 2010.
Archaeologists found a ship among the debris; it was only around 22 feet below street level.
It makes sense that the ancient wooden ship raised a lot of concerns. How did it arrive here? Why was it in this location? How did the ship get to be in the center of New York City?
Since then, researchers have unearthed the mysteries surrounding the enigmatic craft.
They were able to determine the age of the shipwreck by analyzing the tree rings on its wooden skeleton.
They learned that the wood from which the vessel was constructed originated in Philadelphia around 1773.
That being said, how in the world did a big wooden ship end up in the center of the city?
The World Trade Center’s exact location was in the Hudson River when Manhattan was initially inhabited.
Researchers are unsure about the cause of the ship’s sinking—a mishap or an accident.
Manhattan’s western shoreline shifted westward as New York built, finally burying the ship under debris and other waste.
Archaeologist Molly McDonald told CNN in 2014: “It’s such an intense site already based on its recent history, so to be in the midst of this urban, modern, very fraught location, and then to be sitting on what was a river bottom, with clams and fish, and the smell of low tide, was really an amazing juxtaposition.”
The ship would have been fully hidden from view by 1818, until the September 11 attacks of 2001.
And when Americans, New Yorkers, and people everywhere else watched in horror as a Boeing 767 filled with 20,000 gallons of jet fuel smashed into the World Trade Center’s northern tower on that terrible day, the ship was well and truly long forgotten.
The 110-story tower had a huge hole in it from the collision, which quickly killed hundreds of people.
An estimated 50,000 people worked in the buildings on a regular weekday.
It was estimated that an additional 140,000 individuals visited the Twin Towers on a daily basis.
It is mind-boggling that the World Trade Center was so big that it got its own zip code, 10048.
2,977 innocent individuals lost their lives as a result of the attacks, while thousands more suffered injuries.
And over the years, a great deal of people have passed by the location without realizing the nautical gem buried beneath.
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