We all know how important it is to exercise regularly if you want to live a long and happy life. But what most people forget is that it is just as important to do the same for your brain, especially when you start getting a little older.

There are, of course, many ways to exercise the brain, crosswords and sudoku, for example, used to be the most popular back in the day. Lately, however, a whole new kind of challenge has emerged, causing waves of frustration and upsets online!

Doing a little brainteaser is never a bad thing, your mind becomes clearer after challenging itself a little. And not in the way you challenge it during work. There is no pressure, only satisfaction in these kinds of exercises.

The challenge below is one of my favorites!

## Trying to remember school math

The challenges like the one we’ll show you below are getting pretty popular online. It isn’t about some kind of impossible calculation, but about honest old school math. This is probably why it is so fun to take on these types of challenges, just trying to remember the process brings in a little nostalgia while giving you a sense of accomplishment at the same time.

## Solve the problem â€“ without a calculator

Okay, to the challenge. Below we see a picture with a math problem. Can you solve it without a calculator â€“ what answer will you come up with?

How was it? Take your time and concentrate! Below you will see the correct answer.

## Here is the solution

The answer is **104.**

Why is **104** the correct answer? You might ask.

For starters, we have to calculate the multiplication, **25 x 0**, which becomes **0**.

Then we have the number **50 + 50 – 0 + 2 + 2 ** which is **104**.

So again, the answer is **104**.

**Did you get it right? Congratulations on that case! Now press that SHARE button and see if your friends manage to solve it!**