An IQ of 140 is achieved by:
A) 1 in every 261 people.
B) 1 in every 1024 people.
C) 1 in every 5206 people.
Answer: A person who registers an IQ of 140 on an IQ series of tests for which the mean is 100 and standard deviation 15, is in the 99.616957th percentile. This means that they have scored higher than 99.6% of the population on the test, an achievement equalled or bettered by only 1 in 261 people. Answer A is the closest estimate.
