What does an IQ of 135 mean?

Answer 1

Assuming that a score of 135 was earned on a test with a standard deviation of 15 (not 16 or 24) (e.g. Wechsler, as opposed to Stanford-Binet or Cattell), said score places one at the 99th percentile (assuming a mean score of 100; globally, mean IQ is approximately 88, circa 2015, placing a score of 135 above the 99.9th percentile [one per one-thousand people]). There are some intellectual (high-IQ) societies that accept only individuals who have scored at or above the top 1% (mean 100); the largest and oldest of these is Intertel.