how many people in the world use their brain?
486713
Everyone in the world uses their brain for simple operations like breathing, pumping blood etc. But although this is the answer to your question, it is not the answer you are looking for. The question should read "How many people use common sense?" after looking through the answers you have received, my answer to this would have to be common sense isn't all that common anymore.
426639
are you serious?! go to www.pubmed.org, type in 'brain'... I'm pretty sure you'll get in excess of 100,000 articles...
1180691
because the body cannot live without BRAIN
14837
I dont believe we are 400 years away. I've seen predictions that put it more between 50 to 100 years, or even less. \n\nEven without understanding our own brains, we can replicate the processing power. Studies in Neural network technologies have shown potential for future applications in articificial intellience. These networks can be simulated in software, and are used through out the world for various tasks.\n\nNeural nodes are 'trained' to react to certain stimulus. A larger network of trained neural nodes can then be trained to react quite similarly to the human brain.\n\nSo i'm not sure where the 400 years number comes from, but i believe it will be a lot soon.
227352
About two million.\n\n(600,000 males above 18 plus women and children.)
71583
In rough numbers, the world has about 6 billion people\nand the US has about 300 million, so that's roughly 5%.\n\nUsing more accurate numbers from the US Census bureau:\nworld = 6,494,760,917\nUS    = 298,009,292\nwhich works out to be about 4.6%
977134
There are 194 countries in the world today
168206
8 hundred million people worldwide.
115873
We do use our brains but there are many functions of the brain remains unknown and not discovered.Some of the percentage makes up the mass of water,blood vessels,white blood cells...Who knows in ancient times we 've got telepathic ability?=P
212259
the brain is capable of processing 400,000 bits of information a second,we process 2000 what does that tell you?consciously trying to solve two difficult problems at once is unlikely.Good Luck
604181
i think 1300050785 peoples use mobile phone in all over the world
165588
Just to add to webserfun's excellent answer:\n\n"That tired Ten-Percent claim pops up all the time. In 1998, national magazine ads for U.S. Satellite Broadcasting showed a drawing of a brain. Under it was the caption, "You only use 11 percent of its potential." Well, they're a little closer than the ten-percent figure, but still off by about 89 percent. In July 1998, ABC television ran promotional spots for The Secret Lives of Men, one of their offerings for the fall season's lineup. The spot featured a full-screen blurb that read, "Men only use ten percent of their brains."\n\nOne reason this myth has endured is that it has been adopted by psychics and other paranormal pushers to explain psychic powers.\n1) Brain imaging research techniques such as PET scans (positron emission tomography) and fMRI (functional magnetic resonance imaging) clearly show that the vast majority of the brain does not lie fallow. Indeed, although certain minor functions may use only a small part of the brain at one time, any sufficiently complex set of activities or thought patterns will indeed use many parts of the brain. Just as people don't use all of their muscle groups at one time, they also don't use all of their brain at once. For any given activity, such as eating, watching television, making love, or reading, you may use a few specific parts of your brain. Over the course of a whole day, however, just about all of the brain is used at one time or another."
1143349
No, it is an urban myth.\n\nWhile for the people who repeat that myth, it's probably true, the rest of us happily use all of our brains.
1186366
^&^&^&\n\n most peoples\neee haw
572441
Every day 400000 babies are born, 150000 people die for a net increase of 250000 human beings a day. So it is approximately 3 to 1 as you guessed.\n\nCurrently the worldpopulation increases with 90 million a year, or about 1.4%. We are crowding 6500 million people on the planet.
81283
The percentage of a group of people that can read and write.
1181272
Everyone with a brain.