The answer is probably no. Traditional school of thought has been that your IQ is at it’s maximum potential when you’re relatively young, which is why IQ tests are usually given in the 3rd or 4th grade. New research out of the University of Michigan has suggested that with simple daily brain exercise, you can actually increase your intelligence capacity.
According to the study, “Fluid Intelligence” (called Gf) is the ability to reason, solve new problems and think in the abstract. It correlates with professional and educational success and it appears to be largely genetic.
Past research has suggested you’re stuck with whatever Gf you were born with, but new research suggests the gains from training your mind daily can actually increase your mental capacity across all activities.
The task the study participants were given involved tracking small squares on a 
screen, and pressing when a square was in a duplicate location; kind of like the sweet game Simon from the ’80s. Participants played the game for about 20 minutes a day for a max of 20 days.
The sample size on the study is somewhat questionable with only about 70 adults in total, but it does give hope to all of us that hope to keep our feeble minds sharp as we age.
If anything the study reinforces how important it is to train your mind on a daily basis. Dig out your old Simon game from the basement and keep up the Sidoku puzzles - you still have a chance to be the next Einstein! 
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