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!
For 25 years, a man has been living alone in a cave with his dog. Take a look inside the cave now!
Despite the conveniences that come with modern technology and its developments, I find it surprising that some people still use antiquated equipment.
Consider the 67-year-old guy who constructed this cave, demonstrating that aging was not a barrier to his ability to complete such a massive effort. With little money in hand, he toiled diligently on his project using simple home tools like a shovel and cart. Despite not having a formal education, he believes that people would recognize the quality of his craftsmanship.
When the man started excavating his cave in 1987, he had no idea that it would grow to be as well-known and popular as it is now, with a variety of artifacts hanging on its walls. Ra Paulet’s caverns are so beautiful that it is hard to put a value on them.
The man has so far finished 14 caverns and is working on his 15th, which he claims will be his best to yet. See the video below for more information.
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