IQ 4
Profound Intellectual Disability

An IQ below 20 indicates a profound intellectual disability. This is extremely rare, with only a very small number of individuals having such a low IQ.

An individual with an IQ below 20 typically faces considerable challenges in daily tasks and is likely to be dependent on others for meeting their needs. They may also struggle significantly with understanding their environment and with communication.

Book Recommendations

Outliers: The Story of Success

Malcolm Gladwell

In this stunning new book, Malcolm Gladwell takes us on an intellectual journey through the world of "outliers"--the best and the brightest, the most famous and the most successful....

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Brain Games #1: Lower Your Brain Age in Minutes a Day

Brain Games

This is the first book in the popular Brain Games Lower Your Brain Age in Minutes a Day series, which was developed to help people increase their memory, sharpen their reasoning, and expand their creative thinking....

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IQ Challenge: More Than 500 Visual, Verbal and Numerical Puzzles to Help Improve Your IQ

Deborah Hercun

IQ Challenge is divided into 20 sections of equal length, ranging from simple games and conundrums at the beginning, to fiendishly difficult logic puzzles....

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