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.

Full study (in Japanese, see page 20 of document). I relied on the English source listed below and Google translations other Japanese media who interpreted the statistics.
https://www.chukeiren.or.jp/wp..../wp-content/uploads/

Source (English)
http://en.rocketnews24.com/201....5/12/05/does-this-ma

Sources (Japanese)
http://www.j-cast.com/2015/12/03252296.html?p=all
http://www.yukawanet.com/archives/4618548.html

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