" If men and women are equally intelligent, statistically speaking, then out of the smartest ten people in the world, five should be male and five should be female."

This is false. Females are less represented on both the extreme low end and extreme high end of IQ. While it is true that the average IQ is roughly the same for women and men this is because most women are around the same average value, while there are much more men at the top end and lower ends (i.e. most geniuses are men and most idiots are men). So the 10 smartest people in the world are most likely all men.