You selected 14 hours. Here’s how others in your region answered. Click Continue to proceed to the next question.
  • 5 hours 46%
  • 7 hours 49%
  • 10 hours 3%
  • 14 hours 2%
CONTINUE

Interesting fact:

For siblings, the order of birth has no influence on intelligence, even if you keep hearing that firstborns are supposed to be the smartest. It is pure myth. Rather, intelligence depends on genes, age, personality, family size and the age of the parents.