He devised a simple formula for calculating an index of intelligence, or intelligence quotient (IQ)

Which of the following hormones is manufactured in the testes?

a) progesterone b) oxcytocin c) androgen d) estrogen

Between the ages of 12 and 20 what percentage of the brain's gray matter is purposefully lost?

a. 7 to 10% b. 12 to 15% c. 17 to 20% d. 22 to 25%