Last year Department Store X had a sales total for December that was 4 times the average (arithmetic mean) of the monthly sales totals for January through November. The sales total for December was what fraction of the sales total for the year?

As a salesperson, Phyllis can choose one of two methods of annual payment: either an annual salary of $35,000 with no commission or an annual salary of $10,000 plus a 20 percent commission on her total annual sales. What must her total annual sales be to give her the same annual pay with either method?

If x is an integer and y = 3x + 2 which of the following CANNOT be a divisor of y ?

The cost to rent a small bus for a trip is x dollars, which is to be shared equally among the people taking the trip. If 10 people take the trip rather than 16, how many more dollars, in terms of x, will it cost per person?

David used part of $100,000 to purchase a house. Of the remaining portion, he invested 1/3 of it at 4 percent simple annual interest and 2/3 of it at 6 percent simple annual interest. If after a year the income from the two investments totaled $320, what was the purchase price of the house?

If the volume of a ball is 32,490 cubic millimeters, what is the volume of the ball in cubic centimeters?

(1 millimeter = 0.1 centimeter)

What is the remainder when 3²⁴ is divided by 5 ?

What is the value of 2x² - 2.4x - 1.7 for x = 0.7 ?

At a certain pizzeria,~$1 \over 8$~of the pizzas sold in one week were mushroom and ~$1 \over 3$~ of the remaining pizzas sold were pepperoni. If n of the pizzas sold were pepperoni, how many were mushroom?

If xy > 0 and yz < 0, which of the following must be negative?