Can you solve this test without a calculator?

So the correct answer is: -99

And you, did you find it?
If so, congratulations! You have solid mathematical logic and a good memory of your school foundations. If not, no worries: this kind of challenge is there to remind us of rules that we sometimes forget in everyday life.

And let's be honest, it's not every day that you have to solve this type of equation between two messages or while preparing dinner. But it's an excellent exercise to wake up your neurons, stimulate your memory... and impress your loved ones at the next aperitif quiz!

These little challenges that are good for our brains

Beyond the fun aspect, math puzzles are a real workout for our minds. They force us to slow down, focus, and reorganize our thoughts. A bit like mini yoga for the mind, in short!

So why not make it a ritual? A little challenge a day to keep your mind sharp, while having fun. Share it with your children, your partner, or your colleagues for a more original coffee break.