hello. This is ktgmath.
Today I brought you some math puzzles that will help your thinking skills and creativity.
These were already made into shorts on the YouTube channel,
but it was late because I didn't have time to organize them.
Now that the holidays are here, it might be a good idea to take a break when you have time.(Korean New Year)
The first thing I'm going to show you is the four numbers 4.
It was amazing that you could create numbers from 0 to 20 using the number 4 and the operation symbols.
There is a concept here that many videos on YouTube say are easy for Koreans but difficult for foreigners.
< Perform the parentheses operation first. Do multiplication and division first.>
These four number 4 problems seem to be a good problem to practice
and learn about parentheses operations and the priorities of operations.
Think about it for a moment and see the answer.
It's amazing how many different ideas can be formed with numbers.
There are a lot of really ingenious problems.
If you solve and think about many problems,
and do so, your problem-solving skills in discrimination questions will naturally improve.
Please try numbers 4 through 9.
Who can find all the answers in 10 seconds?
I couldn't set the timer for too long because I was afraid the video would be too long.
This is not a video, so I recommend that you think about it slowly.
Even if you got the answer from the video, think about it again slowly.
The next problem is the archery problem
Score 100 points with 6 arrows.
It's relatively easy to make if you focus on the one's digit.
The other numbers are so big that it's relatively easy to come up with the right answer.
Time is the key, so you need to practice guessing what numbers are in a short period of time.
This problem is a basic number regularity problem.
Since it is not a simple arithmetic sequence or a geometric sequence, it is not immediately visible.
Think about what the rules are.
However, if you look closely at the differences, you can see a sequential sequence.
I was worried that it would disturb me while I was thinking, so I quickly left the space.
The next problems are good for practicing looking at numbers in various ways.
While teaching students, I clearly feel how helpful background knowledge in mathematics is in their thinking.
There are many problems that are difficult to solve simply with the knowledge of the unit.
Students who are not familiar with mathematics say, ‘This unit is worth a try’ and like it.
I have seen many people become frustrated when encountering problems that mix different mathematical knowledge.
It would have been nice to have been exposed to math beforehand.
Nowadays, we live in a world where it is easy to access things in advance.
I hope you prepare by experiencing a variety of things.
Do you see the rules?
I think this is a question that helps us understand why it is called ‘mathtricks’ when expressed in English.
The question is whether you can see the arrangement of numbers differently.
In my personal opinion, I don't think it's a problem with great mathematical merit.
Is it just that you can become familiar with numbers and become familiar with square numbers?
oh! I guess I gave too strong a hint.
It's also a Mensa puzzle problem.
Mensa problems seem to like novelty of thinking and approaches from various perspectives.
'The more you know, the more you can see.'
While teaching math, I see a lot of students' approaches to problems.
You can clearly see the difference in approach between a student
who has a lot of knowledge and a student who only studied a specific exam area.
I think that math puzzles and math quizzes were created to develop students' diverse thinking skills.
thank you This is ktgmath, a math knowledge channel.
This is a YouTube video link.
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