Brain Teaser Math Puzzle: If 10=31, 8=31, 7=31, 5=31, Then 9=?

Brain Teaser Math Puzzle: If 10=31, 8=31, 7=31, 5=31, Then 9? it can be solved only if you have a vigil mind with a penchant for solving puzzles. You can solve this matchstick puzzle with logical reasoning. Let us find out if we can solve this brain teaser.

by Durga K | Updated Dec 22, 2022

Brain Teaser Math Puzzle: If 10=31, 8=31, 7=31, 5=31, Then 9=?     

Brain teasers are exciting puzzle that needs thinking to solve. Brain teasers make you think out of the box and exploit your mind's potential. One of the most recent brain teasers that have been trending on social media and boggling many minds is  Brain Teaser Math Puzzle: If 10=31, 8=31, 7=31, 5=31, Then 9=?     

Let us first have a look at what this puzzle is.

Image source: Fresherslive

Brain Teaser Math Puzzle: If 10=31, 8=31, 7=31, 5=31, Then 9=?- Solution

If you are still trying to get the answer to this, we have a hint for you, there are a few different solutions, but we have given you one of the easiest solutions here. Let us now see the solutions and its explanation. 

  • Take the 10, 8, 7, and 5 as months; all have 31 days in them.

  • Now the 9th month is September, which has 30 days in it. 

  • So, the missing number is 30. 

The picture given below will make you understand this solution better.

Image source: Fresherslive


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Brain Teaser Math Puzzle: If 10=31, 8=31, 7=31, 5=31, Then 9=?-FAQ

1.  If 10=31, 8=31, 7=31, 5=31, Then 9=?  
  • Take the 10, 8, 7, and 5 as months, and all have 31 days in them
  • Now the 9th month is September, which has 30 days in it. 
  • So, the missing number is 30. 3
2. What is a brain teaser?     

Brain teasers are an exciting puzzle that needs thinking to solve.

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