Google has been our savior at multiple occasions and 2015 was no exception in this regard. We used the search engine to look up song lyrics, book movie tickets and get answers to many intricate problems.

Just like its list of top searched movies, books, and albums, Google has also released the top 10 list of “what is” questions. Surprisingly, a time-worn maths problem has topped the list. Well, as I’ll tell you the problem, you’ll be a little bit disappointed: What is 0 divided by 0?

While we expect the most people to answer this question instantly, it looks like this isn’t the truth. As a result, this math problem topped the Google’s charts of “what is” questions of 2015.

The Wikipedia answers this question in following words:

*In mathematics, division by zero is division where the divisor (denominator) is zero. Such a division can be formally expressed as a/0 where a is the dividend (numerator). In ordinary arithmetic, the expression has no meaning, as there is no number which, multiplied by 0, gives a (assuming a≠0), and so division by zero is undefined. Since any number multiplied by zero is zero, the expression 0/0 also has no defined value; when it is the form of a limit, it is an indeterminate form.*

Earlier in June, it was discovered that Siri gets sassy when she’s asked this question. Here’s her response that might help you understand the above answer more easily:

*Imagine that you have zero cookies and you split them evenly among zero friends. How many cookies does each person get?*

*See? It doesn’t make sense. And Cookie Monster is sad that there are no cookies. And you are sad that you have no friends.*

To know the complete top 10 “what is” questions of 2015, take a look at the complete list below:

*What is 0 divided by 0?**What is Ashley Madison?**What is a Buckeye?**What is the Charlie Charlie Challenge?**What is a Lunar Eclipse?**What is Ebola?**What is ISIS?**What is Red Nose Day?**What is a Blue Moon?**What is Listeria?*