9 - 3 ÷ 1/3 + 1 = ? The Correct Answer (Viral Problem In Japan)
What is 9 - 3 ÷ 1/3 + 1 = ? This problem went viral in Japan after a study found 60 percent of 20 somethings could get the correct answer, down from a rate of 90 percent in the 1980s. I explain a common mistake and how to get the correct answer by using the order of operations.\r
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Source (English)\r
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Sources (Japanese)\r
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If you like my videos, you can support me at Patreon:\r
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If you buy from the links below I may receive a commission for sales. This has no effect on the price for you.\r
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My Books\r
The Joy of Game Theory shows how you can use math to out-think your competition. (rated 3.8/5 stars on 31 reviews)\r
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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)\r
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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. \r
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Math Puzzles Volume 2 is a sequel book with more great problems. (rated 5/5 stars on 3 reviews)\r
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Math Puzzles Volume 3 is the third in the . (rated 3.8/5 stars on 4 reviews)\r
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40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.3/5 stars on 12 reviews)\r
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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) \r
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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)\r
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Source (English)\r
\r
\r
Sources (Japanese)\r
\r
\r
\r
If you like my videos, you can support me at Patreon:\r
\r
\r
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.\r
\r
My Blog: \r
Twitter: \r
Facebook: \r
Google+: \r
Pinterest: \r
Tumblr: \r
Instagram: \r
Patreon: \r
\r
Newsletter (sent about 2 times a year): \r
\r
If you buy from the links below I may receive a commission for sales. This has no effect on the price for you.\r
\r
My Books\r
The Joy of Game Theory shows how you can use math to out-think your competition. (rated 3.8/5 stars on 31 reviews)\r
\r
\r
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)\r
\r
\r
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. \r
\r
\r
Math Puzzles Volume 2 is a sequel book with more great problems. (rated 5/5 stars on 3 reviews)\r
\r
\r
Math Puzzles Volume 3 is the third in the . (rated 3.8/5 stars on 4 reviews)\r
\r
\r
40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.3/5 stars on 12 reviews)\r
\r
\r
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) \r
\r
\r
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)\r
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TV