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!
This house, located at 2,800 meters above sea level, is considered the loneliest in the world and fascinates with its interior
Nestled in the Italian Dolomites, Buffa di Perrero sits at 2,800 meters above sea level and is often referred to as “the loneliest house in the world”.
Although this isolated structure has been abandoned for a century, it still captures the imagination.
The origins of the Buffa di Perrero are mysterious. It is widely believed that during World War I, workers were sent to this remote location to build some sort of shelter.
Legend has it that Italian soldiers built this hidden refuge to escape harsh weather conditions and seek shelter during battles with the Austro-Hungarian Empire.
Constructed of brick walls and a sloping roof, the building features four windows and camping chairs, stimulating curiosity about how the materials were transported to such a remote location. Steel ladders and ropes were used to negotiate the treacherous terrain and access the structure.
During World War I, similar “bivouacs” were constructed along the Italian front as temporary rest areas and strategic observation points amid the intense mountain warfare.
Since then, the weather damage has taken its toll. The hut reportedly became “unusable” for climbers after the roof collapsed. Nevertheless, adventurers can take a look into this mysterious house via steel ladders, rungs and ropes.
The interior, with its wooden decor, evokes the attempts of both soldiers and modern explorers to relax in this remote refuge.
Inspired by the Buffa di Perrero, the Auronzo Club Alpino Italiano (CAI) built a modern refuge near the Forcella Marmarole pass.
For those seeking an adventurous trip, a challenging five-hour hike leads to this modern hideaway reminiscent of the Buffa di Perrero. Like many iconic landmarks, the Buffa di Perrero has given rise to numerous imitations.
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