### Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

This problem has been shared millions of times on Twitter/Facebook with the claim 99% fail to solve it and that only a genius could find the correct answer. If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? In this video I explain what many people believe to be the correct answer. I also show how this answer is logical for other patterns seen in the puzzle.

My blog post on this video (with links to sources)

If you like my videos, you can support me at Patreon:

Connect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you.

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My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 3.8/5 stars on 31 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 5/5 stars on 2 reviews)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 5/5 stars on 3 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 3.8/5 stars on 4 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.3/5 stars on 12 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.7/5 stars on 4 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 3 reviews)

### Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

Can you solve this viral puzzle? If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? This problem has been shared millions of times on Twitter/Facebook with the claim 99% fail to solve it and that only a genius could find the correct answer. If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? In this video I explain what many people believe to be the correct answer. I also show how this answer is logical for other patterns seen in the puzzle.

Watch our other videos as well:

1. The Tree Puzzle - 99% Fail to answer this tricky math puzzle (With Answer)

2. Can you solve this shoes whistle and man puzzle?

3. 45 23 10 Banana Clock Shape Puzzle answer | Tricky puzzle | 99% failed

4. Crack the code! Tricky Puzzle! Solved!

5. Guess the IPL Players with Emoji | Emoji Quiz

Share this video as much as you can.

Like this video, and subscribe to our Youtube channel.

Like our facebook group: PUZZLE ADDA

Keep watching for more videos.

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Please watch: I Have Six Eggs, I Break Two, I Cooked Two, I Ate Two Riddle

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### "Only 1 In 1000 Can Solve" The Viral 1 + 4 = 5 Puzzle. The Correct Answer Explained

This problem was shared on Facebook with the claim that only one in a thousand could figure it out. It went viral and generated over 3 million comments. Here is the problem. If 1 + 4 = 5, 2 + 5 = 12, 3 + 6 = 21, what is 8 + 11 = ? This video presents what many people believe to be the correct answer.

Blog post (text explanation and an extra proof):

Facebook post that went viral

Telegraph coverage

Reddit Puzzles

Subscribe:

Playlist to watch all videos on MindYourDecisions

This is the only channel to feature math topics suggested by people around the world. Support the channel on Patreon so we can share the beauty of mathematics and make the world a better place:

If you buy from the links below I may receive a commission for sales. This has no effect on the price for you.

My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 4/5 stars on 34 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 4.6/5 stars on 3 reviews)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 4.5/5 stars on 6 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 4/5 stars on 6 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.4/5 stars on 13 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.8/5 stars on 5 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 4.4/5 stars on 5 reviews)

Connect with me

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### The Viral Balloon Puzzle - The REAL Answer Explained (Using Ph.D. Level Math)

They say only geniuses can solve this puzzle, and this time they are correct.

Thanks to all patrons! Special thanks to:

Shrihari Puranik

Yildiz Kabaran

Kyle

My blog post for this video

Sources

Playlist to watch all videos on MindYourDecisions

This is the only channel to feature math topics suggested by people from around the world. Sadly some textbooks, websites, and other channels think math is limited to specific topics from certain countries--and they are vocal about it. Support the channel on Patreon so we can prove math really is universal:

If you buy from the links below I may receive a commission for sales. This has no effect on the price for you.

My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 4/5 stars on 34 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 4.6/5 stars on 3 reviews)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 4.3/5 stars on 4 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 4/5 stars on 6 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.4/5 stars on 13 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.8/5 stars on 5 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 4 reviews)

Connect with me

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### If You are a Genius, Solve This Viral 9=72 Puzzle! (Answer in Video)

My 250th video!

Are you enough of a genius to solve this viral 9=72 puzzle? If not, don't worry. The answer will be explained to you throughout the video so you can see how 9 equals 72 here. Or, you may pause the video to get more time to figure it out on your own. ;)

Like, comment, and subscribe if you enjoyed as it really helps the channel, also if you want to see more of these videos! Sincerely, One Of A Nice Kind.

### Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

This problem has been shared millions of times on Twitter/Facebook with the claim 99% fail to solve it and that only a genius could find the correct answer. If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? In this video I explain what many people believe to be the correct answer. I also show how this answer is logical for other patterns seen in the puzzle.

My blog post on this video (with links to sources)

If you like my videos, you can support me at Patreon:

Connect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you.

My Blog:

Twitter:

Facebook:

Google+:

Pinterest:

Tumblr:

Instagram:

Patreon:

Newsletter (sent about 2 times a year):

My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 3.9/5 stars on 24 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 5/5 stars on 2 reviews)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.5/5 stars on 11 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 5/5 stars on 3 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 5/5 stars on 3 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.8/5 stars on 9 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.7/5 stars on 3 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 2 reviews)

### Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

### "Only Geniuses Can Solve" The Viral 11x11 = 4 Puzzle. The Correct Answer Explained

If 11x11=4 and 22x22=16, what is 33x33=? This puzzle has been shared with the claim that only geniuses can solve it. It has gotten millions of views on the internet and Facebook as people have debated the correct answer. In this video I present what many people believe to be the correct answer. I then show how the approaches for two popular answers can be reconlined mathematically using the method of multiplying by lines (known also by the names visual multiplication, how the Japanese multiply, Chinese stick multiplication, and Vedic multiplication.)

Blog post:

Quora discussion

If you like my videos, you can support me at Patreon:

Connect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you.

My Blog:

Twitter:

Facebook:

Google+:

Pinterest:

Tumblr:

Instagram:

Patreon:

Newsletter (sent about 2 times a year):

If you buy from the links below I may receive a commission for sales. This has no effect on the price for you.

My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 3.8/5 stars on 31 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 5/5 stars on 2 reviews)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 5/5 stars on 3 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 3.8/5 stars on 4 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.3/5 stars on 12 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.7/5 stars on 4 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 3 reviews)

### Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

### "Only 1 In 1000 Can Solve" The Viral 1 + 4 = 5 Puzzle. The Correct Answer Explained

This problem is very popular on facebook and many people have failed solved this puzzle. Can you solve this puzzle? Here is the problem. If 1 + 4 = 5, 2 + 5 = 12, 3 + 6 = 21, what is 8 + 11 = ?

This video gives the correct solution of this puzzle with popular explanation.

Watch our other videos as well:

1. The Tree Puzzle - 99% Fail to answer this tricky math puzzle (With Answer)

2. Can you solve this shoes whistle and man puzzle?

3. 45 23 10 Banana Clock Shape Puzzle answer | Tricky puzzle | 99% failed

4. Crack the code! Tricky Puzzle! Solved!

5. Guess the IPL Players with Emoji | Emoji Quiz

Share this video as much as you can.

Like this video, and subscribe to our Youtube channel.

Like our facebook group: PUZZLE ADDA

Keep watching for more videos.

-~-~~-~~~-~~-~-

Please watch: I Have Six Eggs, I Break Two, I Cooked Two, I Ate Two Riddle

-~-~~-~~~-~~-~-

### Can You Solve The Viral 9+ 3 = 612 Puzzle? The Correct Answer Explained

Here is the problem. If 9 + 1 = 810, 9 +2 = 711, what is 9 + 3 = ? This video presents what many people believe to be the correct answer.

### math test , if 9 = 90 , 8 = 72 , 7 = 56 , 6 = 42 , 3 = ?

To ask Unlimited Maths doubts download Doubtnut from - math test , if 9 = 90 , 8 = 72 , 7 = 56 , 6 = 42 , 3 = ?

### Can You Solve The Viral 1 + 4= 5 Puzzle The Correct Answer Explained

### Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

### The Viral 1 + 4 = 5 Puzzle The Correct Answer Explained

Viral Math Problem 1 + 4 = 5, 2 + 5 = 12, 3 + 6 = 21, what is 8 + 11= ?

Subscribe:

This video presents what many people believe to be the correct answer.

mathematics, math, maths, riddle, brain teaser, puzzle, math puzzle, find the pattern,

A mathematician might take a literal approach.

1 + 4 = 5

2 + 5 = 12

3 + 6 = 21

8 + 11 = ?

The first equation is true, the second and third are false, and the answer to the equation should be 19.

But riddles like this are not about literally interpreting mathematical symbols. They are about identifying a pattern in the set of equations and applying it to the unknown.

The answer that jumped into my mind is to add the first number to the product of the two numbers to get the answer. That is:

a + b means a + ab

This works for the known equations.

1 + 4 means 1 + 1(4) = 5

2 + 5 means 2 + 2(5) = 12

3 + 6 means 3 + 3(6) = 21

Applying the pattern to the last equation gives the answer of 96.

8 + 11 means 8 + 8(11) = 96

The answer of 96 is valid according to this interpretation. Furthermore, many other IQ tests have this sort of pattern where you take two numbers and find a hidden equation that involves simple operations like addition, subtraction, multiplication, division, and exponentiation.

But some people interpreted the problem differently and arrived at a different answer.

Another interpretation: running total

Some people felt the pattern was a running total: add the result in the previous line to the new numbers to get the new answer.

The first line is valid mathematically.

1 + 4 = 5

For the next line, take this result of 5 and add it to the new numbers to get the new answer.

5 + 2 + 5 = 12

Do the same thing for the next line: add the previous line’s result of 12 to the new numbers to get the next result.

12 + 3 + 6 = 21

To solve the puzzle, do the same for the final line.

21 + 8 + 11 = 40

This pattern results in an answer of 40, and many people suggested this answer is more valid.

So what is the answer? Is it 40 or 96? While we cannot know for sure what the puzzle maker had in mind, there is a way to reconcile these two approaches. It turns out the running total can also lead to the answer of 96, if you decide to fill in the pattern a bit more.

Running total missing lines

Suppose the answer in each line is the running sum total of the previous result and the new numbers.

1 + 4 = 5

5 + 2 + 5 = 12

12 + 3 + 6 = 21

Notice that in each line the new numbers are incremented 1 more from the previous line. For example, 1 + 4 is turned into 2 + 5; so both the numbers 1 and 4 are increased by 1. Then 2 + 5 is increased to 3 + 6.

We can continue this pattern, so the next lines would be 4 + 7, then 5 + 8, then 6 + 9, then 7 + 10, and then 8 + 11.

What is the running total when we include these “missing” lines?

1 + 4 = 5

5 + 2 + 5 = 12

12 + 3 + 6 = 21

21 + 4 + 7 = 32

32 + 5 + 8 = 45

45 + 6 + 9 = 60

60 + 7 + 10 = 77

77 + 8 + 11 = 96

### The Viral 1 + 4 = 5 Puzzle : Maths Puzzles with Answers

The Viral 1 + 4 = 5 Puzzle : Maths Puzzles with Answers

This puzzle is no ordinary one. Shared on Facebook, it went viral with over 4 million comments. Weekly, viral Math puzzles, problems and tricks with answers and explanations for kids and adults alike

Click on link to watch all our videos :

References:

Script:

Hello Guys and welcome to this weeks Math Puzzle.

Puzzles as you know, are a great way to start the day and get mind ticking.

Solving puzzles regularly will make you a more creative and persistent person.

And today’s puzzle is no ordinary one.

Shared on Facebook, it went viral with over 4 million comments.

So ladies and gentlemen, here it is, today’s puzzle :

1 + 4 = 5

2 + 5 = 12

3 + 6 = 21

8 + 11 = ?

Now, can you guess the missing number?

Please pause the video and and give the problem a shot.

And don’t forget to return and check the solution.

Right, now lets see how we can tackle this problem.

Lets focus on this first line.

I am sure you can see a pattern and it looks easy 1 + 4 is 5.

So lets see if this logic applies to the next line.

2 + 5 is not 12.

But lets stick around and see if we can get to 12 in some other way.

Yes, we can, if we add the previous result to these numbers.

So 5 + 2 + 5 is indeed equal to 12.

Hmmm. But is this a pattern? Lets try this logic for the next line.

So we have 12 + 3 + 6 and that gives us 21.

Cool…

And by this logic the next result should be 21 + 8 + 11 which is 40.

This makes sense but I am not very confident of this answer.

My concern is that that 8 + 11 might not the next pattern.

Let me explain:

As you can see these 3 numbers are in sequence. Similarly these 3 numbers too form a sequence.

So I think the series could actually be like so:

1 + 4 = 5

2 + 5 = 12

3 + 6 = 21

4 + 7 = ?

5 + 8 = ?

6 + 9 = ?

7 + 10 = ?

8 + 11 =

So basically 8 + 11 is part of the series but it comes much later.

But lets try out our logic to find the missing values

So this value here is 21 + 4 + 7 which gives us 32.

And so on…

And finally applying the same rule to our last line we get 77 + 8 + 11 which is 96.

96 took longer to arrive at but it certainly seems a more appropriate solution than 40.

But lets see if we can find another pattern. So lets look at our numbers again:

1 + 4 = 5

2 + 5 = 12

3 + 6 = 21

8 + 11 = ?

The first result could also be arrived at using the following pattern

1 + ( 4 x 1 )

Similarly the second result which is 12 can also be arrived at by using the same pattern

2 + ( 5 x 2 )gmailyoNow why don’t you apply this pattern to the third line and see if it works?

It does, right?

So since we have a working pattern, let us apply it to the 4th line.

We get

8 + ( 11 x 8 ) which gives us 96.

Voila, we have a match with our previous solution.

The nice thing about this pattern is the fact that it does not rely in other lines but is self sufficient.

So guys, if you have other solutions to this problem, please mention them in the comments section.

And thanks for stopping by and watching this video.

If you found it helpful, please subscribe to my channel and like the video.

My name is Sanjay and I fun and viral math videos every week.

Thanks for watching and take care.

### What Is 48÷2(9+3) = ? The Correct Answer Explained

What is 48÷2(9+3) = ? This problem went viral and generated millions of comments on Facebook, Twitter, YouTube and social media sites. I explain how to get the correct answer by using the modern interpretation of the order of operations. I also explain how you would get a different answer under historical usage of the division symbol.

Blog (text explanation):

Here is a 1917 article from The American Mathematical Monthly that explains the usage of the division symbol as an exception to the order of operations

Google evaluation

WolframAlpha evaluation

If you like my videos, you can support me at Patreon:

Connect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you.

My Blog:

Twitter:

Facebook:

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Pinterest:

Tumblr:

Instagram:

Patreon:

Newsletter (sent only for big news, like a new book release):

If you buy from the links below I may receive a commission for sales. This has no effect on the price for you.

My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 3.8/5 stars on 31 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 5/5 stars on 2 reviews)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 5/5 stars on 3 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 3.8/5 stars on 4 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.3/5 stars on 12 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.7/5 stars on 4 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 3 reviews)

### Shoes, Man and Strap Puzzle - Only For Genius

Can you solve this shoes, man, and strap puzzle, which is very popular all over the internet, and very few people could able to give the correct answer.

This puzzle is also termed as Dimagi Kushti in hindi.

shoes + shoes + shoes = 30

man + man + shoes = 20

straps + straps + man = 13

shoe + man + strap = ?

Some sources has considered the strap as ribbon or tie.

Like, Share & Subscribe.

Give your feedback in the comment section. Would love to hear it from you.

You will love to watch our popular videos:

1. Shoes, Boy and Popcorn Puzzle - Only For Genius:

2. Shoes, Man and Strap Puzzle - Only For Genius:

3. For Geniuses Only || 99.99% people will fail to solve this puzzle:

4. Fill The Boxes Using 1, 3, 5, 7, 9, 11, 13, 15 - Gaurav Agarwal's IAS Exam Question:

5. Only 1 Out of 7 Will Get This Right:

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Please watch: I Have Six Eggs, I Break Two, I Cooked Two, I Ate Two Riddle

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### What is 6÷2(1+2) = ? The Correct Answer Explained

What is 6÷2(1+2) = ? This problem went viral and generated millions of comments on Facebook, Twitter, YouTube and social media sites. I explain how to get the correct answer by using the modern interpretation of the order of operations. I also explain how you would get a different answer under historical usage of the division symbol.

*I get many, many emails about this problem. Before you send an email, check out my blog post or in the links provided below which address every concern I have received so far. If you write to me about this be advised I probably will not respond.

Blog (text explanation):

Slate explains the history of the division symbol

Here is a 1917 article from The American Mathematical Monthly that explains the usage of the division symbol as an exception to the order of operations

Google evaluation

WolframAlpha evaluation

Subscribe:

Playlist to watch all videos on MindYourDecisions

This is the only channel to feature math topics suggested by people around the world. Support the channel on Patreon so we can share the beauty of mathematics and make the world a better place:

If you buy from the links below I may receive a commission for sales. This has no effect on the price for you.

My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 4/5 stars on 34 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 4.6/5 stars on 3 reviews)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 4.5/5 stars on 6 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 4/5 stars on 6 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.4/5 stars on 13 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.8/5 stars on 5 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 4.4/5 stars on 5 reviews)

Connect with me

My Blog:

Twitter:

Facebook:

Google+:

Pinterest:

Tumblr:

Instagram:

Patreon:

Newsletter (sent only for big news, like a new book release):

### How To Solve The Viral Matchstick Puzzle 6 + 4 = 4

Can you fix 6 + 4 = 4 by moving 1 matchstick? This problem has gone viral on Facebook, with one post having over 400,000 shares. The ground rules are you cannot break a stick, it should be an equality (=), and you have to use 7-segment numbers (the block numbers 0 to 9 commonly seen on a calculator). The video presents the solution.

My blog post for this video

Sources

BrainDare Facebook (over 400k shares)

Via Inquisitr

Another FB post

Via Indy100

7 segment display numbers

If you like my videos, you can support me at Patreon:

Connect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you.

My Blog:

Twitter:

Facebook:

Google+:

Pinterest:

Tumblr:

Instagram:

Patreon:

Newsletter (sent about 2 times a year):

My Books

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 4/5 stars on 23 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 5/5 stars on 1 review)

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.5/5 stars on 11 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems.

Math Puzzles Volume 3 is the third in the series.

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.9/5 stars on 7 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.7/5 stars on 3 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 1 review)