Viral Math Question. What Is 9 – 3 ÷ 1/3 + 1 = ?

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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.

This video explains a common mistake and how to get the correct answer by using the order of operations.

Source (English)…

Sources (Japanese)……

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And many more in the upcoming weeks



  1. shiv kumar

    May 1, 2016 at 9:00 AM

    very very useful tips

  2. James

    September 29, 2016 at 8:29 AM

    shame on You if You cant solve this without calculator or any help. very very simple

  3. Bob S

    September 30, 2016 at 12:14 AM

    I originally answered 1, using the same logic as you employed. However, PEMDAS/BODMAS, doesn’t dictate that to be the case. Because the division symbol ÷ and / are the same, why do you insist that the 1/3 must be evaluated first? As there are no brackets around the 1/3, one could interpret the ÷ and the / to be of the same “precedence” and since the ÷ is left of the /, perhaps it should be evaluated first.

    This is counter to my learning, of course, but I don’t think PEMDAS/BODMAS in itself dictates an answer of 1.

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