Do Brain Games Really Make You Smarter?

[SxyxS]

if you train your body your body will get stronger
if you do medtitation your focus will increase
why the hell shouldn't you get smarter when you train your brain?
of course you will.

Once i had to make an IQ test because of a professional retraining as it was required,few weeks later i had to do another one at an Agency because they had not received my firstIQ test.
My second test was 20 points better than my first.
The reason was simple:both tests were pretty similar.While I had to make the first test I wasted time to figure out and analyse how things work,i had to remember the rule of three,pythagoras etc
When i made the second test i already knew how the test will look like=i was prepared,and i'm pretty sure i could hace add another 10-20 point with training.

of course you will think faster just as you'll be stronger when you train your muscles,but only in that terms you are training.
You won't run faster when you are a bodybuilder and you won't be able to write great lyrics when you train math.