Yes, indeed! By utilizing puzzles and brain teasers you sharpen your ability to think quantitatively and quickly. By doing sudoku and crossword puzzles you can train your brain to be faster, and thus will improve your performance with day to day puzzles.
Mental exercises like math and brain teasers.
Quiz's and brain teasers are good for the mind
Larry King Now - 2012 Brain Power Sharpen Your Mind 1-177 was released on: USA: 12 June 2013
brain teasers are really fun...!!!!!!! like work to tease your brain obviously lol.. people make them to get people all stressed out in a good way..
What does . That's means on tough turkey teasers
Brain teasers are a good way to improve your mind and have some fun at the same time. They usually require lateral thinking and patience.. Some Of The Best 10 Brain teasrers Are Here--> http://listverse.com/2007/09/21/top-10-brain-teasers/
Nine cumulus
No excuse for it
I don't know a website, but Profesor Layton and the Curious Village and the rest are really hard brain teasers. It is for the Nintendo DS.
Braingle is a family website where you have to use your mind to do things. It has Brain Teasers, Trivia, Mentalrobics, Games and Community sections. I hope this answers your question.
The Riddler
A bee in the bonnet