How many 4-digit positive integers are there in which all 4 digits are even?

Departments A, B, and C have 10 employees each, and department D has 20 employees.  Departments A, B, C, and D have no employees in common.  A task force is to be formed by selecting 1 employee from each of departments A, B, and C and 2 employees from department D.  How many different task forces are possible?

The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively.  Which of the following equals the average (arithmetic mean) of the coordinates of the points R, S, and T ?

4³ + 4³ + 4³ +4³ =

Of the books standing in a row on a shelf, an atlas is the 30th book from the left and the 33rd book from the right.  If 2 books to the left of the atlas and 4 books to the right of the atlas are removed from the shelf, how many books will be left on the shelf?

If x > 0.9, which of the following could be the value of x?

At the end of each year, the value of a certain antique watch is c percent more than its value one year earlier, where c has the same value each year.  If the value of the watch was k dollars on January1, 1992, and m dollars on January 1, 1994, then in terms of m and k, what was the value of the watch, in dollars, on January 1, 1995 ?

If x² – 2 < 0, which of the following specifies all the possible values of x ?

A cash register in a certain clothing store is the same distance from two dressing rooms in the store.  If the distance between the two dressing rooms is 16 feet, which of the following could be the distance between the cash register and either dressing room?

I.  6 feet
II. 12 feet
III.24 feet

If the average (arithmetic mean) of positive integers x, y, and z is 10, what is the greatest possible value of z ?