When was the last time you were engrossed in a really good puzzle? If you haven’t done so in a while, then you’re missing out. When was the last time you were completely absorbed in a challenging puzzle? Can you find the toothbrush in this picture?

Some riddles need that you be an expert mathematician, while others expect you to be a keen observer. They all have one thing in common, though: they make you think. This process indicates that your brain is active, and you should be aware that giving your brain a workout of this nature can be really useful!!!