Brain exercise

It is said, as we grow older and want to stay alert , then we need to continue to find new ways of using all the capacity of our brain, and not letting it become sluggish from lack of use.

There are crosswords, chess, card games, and many, many more ways to exercise our brains.
I came across this chart below which is a fun little exercise as it really makes you concentrate.


How did you do? let me know.