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!
If you see a coin stuck in your car door handle, you’d better call the police
When you were heading toward your car, did you ever notice a coin lodged in the door handle? It’s an odd and perplexing sensation. Many have come to this conclusion after wondering if this was merely an odd accident or if it had some sort of significance. It turns out that burglars can enter cars covertly using this method. Hold on tight, because I’m going to show you how to apply this smart approach to defeat those bothersome auto thieves. We’re going to learn how to perform our own auto security, so hold on tight!
Thieves of smart cars typically choose the side where the passenger is seated when inserting tiny coins into the door handles. That being said, why is the passenger side door buttoned? The problem is that when you attempt to use your key for the central locking, it completely malfunctions. Why? You can’t fully secure your automobile because that seemingly innocuous penny got jammed in the passenger door.
Let’s introduce some mystery now. Car thieves are not just hapless snatchers; they have a more sinister agenda. The burglar might be close by, lurking in the shadows, waiting for you to give up or become preoccupied as you struggle with your key to unlock your car.What should a car owner who is handy with DIY projects do if they believe someone has tampered with their car door? Fear not—here are some helpful do-it-yourself suggestions to prevent the vehicle thief from obtaining it:
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