International High IQ Society the top five percent of the world's population score 126 or higher on their test. Since IQ scores are assumed to be normally distributed we can set up the following equation to obtain the standard deviation:

(126 - 100)/sd = 1.645 (= "z-score") => sd = 15.805

Now I can conclude that a score of 146 is 2.91 standard deviations from the mean, which puts me in the top 0.2 percent of the world's population. Sssssssssssstrike!!! ;-DDDD