Puzzles, Riddles and Brainteasers

4 Replies to “Viral Math Problem – Try It”

1. You answer is still wrong the order of operation has addition BEFORE subtraction so the answer is -1 .. 9 – 9 + 1 …. 9 -10 = -1 … you should always follow the order of operations PEDMAS (BEDMAS)

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2. I come here searching for Viral Math Problem
   – Try It. Now, Mathematics comes from many different sorts of problems.
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   Thus you can study communities, rings, domains and other abstract systems; jointly such studies (for buildings identified by algebraic functions) constitute the area of abstract algebra.

   Here: http://math-problem-solver.com To be able to clarify the foundations of mathematics, the areas of mathematical logic and place theory were developed.

   Mathematical logic includes the mathematical analysis of logic and the applications of formal logic to
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3. Personally think my answer is better and clearer:

   Most people will find answer as 9 but the Correct Answer is 1

   Explanation:
   The most common mistake is writing the 1/3 as: 9 – 3 ÷ 1/3 + 1
   rather than treating it as 1/3 (one third – a fraction)

   Most calculators will not group the 1/3, so the calculator evaluates: 9 – 3 ÷ 1 ÷ 3 + 1
   = 9 – 3/3 + 1
   = 9 – 1 + 1
   = 9

   But if you remember back to school you would do this equation as:

   3 1
   9 – ( – ÷ – ) + 1
   1 3

   3 3
   = 9 – ( – x – ) + 1
   1 1

   Remember that when you change a division to a multiply you turn the
   fraction upside down. You can no just multiply the numerators and denominators to give:

   9
   = 9 – ( – ) + 1
   1

   = 9 – 9 + 1

   = 1

   Note you will also get the correct result if you followed my hint and used 0.33333333 instead of 1/3

   in this case you get

   9 – 3 ÷ 0.3333333333 + 1

   = 9 – 9 + 1

   = 9

   (note you need to round it as the 1/3 in decimal is actually 0.333 repeator)

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   1. Thank you for your explanation. I will try to edit post to simplify explanation.

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