The smartest person in the world was Isaac Newton, a true polymath whose brilliance never has been, nor ever will be, surpassed. Isaac Newton made tremendous advances, largely on his own, across many disciplines of physics and mathematics. He revolutionized gravitation, motion, optics, and co-invented calculus.
Massachusetts is the smartest state in the U.S. Massachusetts has the highest percentage of Bachelor's degree holders at 42.1% of adults and graduate or professional degree holders at about 32.4%.
Anecdotally, smarter people do seem to live longer. Isaac Newton died in 1727 aged 84, the philosopher-mathematician Bertrand Russell lived to 97, while Nobel Prize-winning neurobiologist Rita Levi-Montalcini died in 2012 aged 103.
Adragon De Mello: IQ 400
In 1988, when Adragon De Mello graduated from the University of California, Santa Cruz, with a degree in computational mathematics at the age of 11, he was the youngest college graduate in the United States (a record he no longer holds).
But there once lived a person whose IQ was said to be between 250 and 300! William James Sidis, the most intelligent man to ever walk the Earth, was a child prodigy and an exceptional mathematician. He was a master at multiple dialects and a gifted author as well. But sadly, not many people have ever heard of him.
Top Ten Countries with the Highest Math Ranking:
United States — 45.8% United Kingdom — 6.3% Germany — 6% France — 5.3%
In 1898, the smartest man who ever lived was born in America. His name was William James Sidis and his IQ was eventually estimated to be between 250 and 300 (with 100 being the norm).
1. Isaac Newton. He is an extraordinary genius physicist, mathematician, astronomer and alchemist. He is considered as the most influential and greatest scientist ever lived.
Notably, the average IQ score falls between 85 and 115. A score above 140, meanwhile, is considered to be genius level.
The lowest IQ score is 0/200, but nobody in recorded history has officially scored 0. Any result below 75 points is an indicator of some form of mental or cognitive impairment.
IQ tests are made to have an average score of 100. Psychologists revise the test every few years in order to maintain 100 as the average. Most people (about 68 percent) have an IQ between 85 and 115. Only a small fraction of people have a very low IQ (below 70) or a very high IQ (above 130).
One of the most well-known online exams available to you is Free-IQTest.net. It has 20 questions that will measure your IQ score accurately. After this test, you have to give your birth date since the test calculates your IQ score based on your age. This way, you may compare yourself to your peers.
A Breakdown of IQ Scores
1 to 24: Profound mental disability. 25 to 39: Severe mental disability. 40 to 54: Moderate mental disability. 55 to 69: Mild mental disability.
Based on the OECD's data, Canada is the most educated country globally, with 56.71% of adults meeting the OECD criteria. Japan has the second-highest percentage of 51.44%, followed by Israel with 50.92%.
William James Sidis has the World's Highest IQ. Anywhere from 250 to 300 is his IQ score, almost twice the score of Albert Einstein. At the age of eleven, William famously entered Harvard University, becoming the youngest person to enter.