If you love numbers then here is one interesting brainteaser for you! As you can notice, you just need to fill one square to solve it.
And that missing number is what makes this puzzle challenging. Even though it has a simple answer, it might take a fair bit of pondering to discover what is really going on here.
Remember: The answer is not SIX!
The numbers only seem to be counting upward, so what can be the right result? Can you guess it?
It is important to remember that this question has a simple answer. And when you see the answer on the next page, you may realize you weren’t thinking outside the box.