1-

If x and y are both odd, which of the following cannot be odd?

a) xy
b) 3xy
c) (xy)^2
d) x+y
e) x+y-1

2-
Jessica makes 60% of the income earned between her husband and herself. Her husband earns 2.5 times as much as their neighbor earns. Which of the following is most nearly Jessica's income as a percentage of all three incomes?

a) 0.51%
b) 15%
c) 30%
d) 52%
e) 63%

3-
Jake makes 20% commission on domestic sales and 10% commission on international sales. His international sales last month were double his domestic sales. What percentage of Jake's commission last month came from domestic sales?

a) 25%
b) 50%
c) 75%
d) 80%
e) 100%