Question 1

The median of the list is . What is the mean?

Solution

Question 2

A number is more than the product of its reciprocal and its additive inverse. In which interval does the number lie?

Solution

Question 3

The sum of two numbers is . Suppose is added to each number and then each of the resulting numbers is doubled. What is the sum of the final two numbers?

Solution

Question 4

What is the maximum number for the possible points of intersection of a circle and a triangle?

Solution

Question 5

How many of the twelve pentominoes pictured below have at least one line of symmetry?

Solution

Question 6

Let and denote the product and the sum, respectively, of the digits of the integer . For example, and . Suppose is a two-digit number such that . What is the units digit of ?

Solution

Question 7

When the decimal point of a certain positive decimal number is moved four places to the right, the new number is four times the reciprocal of the original number. What is the original number?

Solution

Question 8

Wanda, Darren, Beatrice, and Chi are tutors in the school math lab. Their schedule is as follows: Darren works every third school day, Wanda works every fourth school day, Beatrice works every sixth school day, and Chi works every seventh school day. Today they are all working in the math lab. In how many school days from today will they next be together tutoring in the lab?

Solution

Question 9

The state income tax where Kristin lives is levied at the rate of of the first of annual income plus of any amount above . Kristin noticed that the state income tax she paid amounted to of her annual income. What was her annual income?

Solution

Question 10

If , , and are positive with , , and , then is

Solution

Question 11

Consider the dark square in an array of unit squares, part of which is shown. The ???rst ring of squares around this center square contains unit squares. The second ring contains unit squares. If we continue this process, the number of unit squares in the ring is

Solution

Question 12

Suppose that is the product of three consecutive integers and that is divisible by . Which of the following is not necessarily a divisor of ?

Solution

Question 13

A telephone number has the form , where each letter represents a different digit. The digits in each part of the numbers are in decreasing order; that is, , , and . Furthermore, , , and are consecutive even digits; , , , and are consecutive odd digits; and . Find .

Solution

Question 14

A charity sells benefit tickets for a total of . Some tickets sell for full price (a whole dollar amount), and the rest sells for half price. How much money is raised by the full-price tickets?

Solution

Question 15

A street has parallel curbs feet apart. A crosswalk bounded by two parallel stripes crosses the street at an angle. The length of the curb between the stripes is feet and each stripe is feet long. Find the distance, in feet, between the stripes?

Solution

This problem is easy if you can come up with the diagram below:

Question 16

The mean of three numbers is more than the least of the numbers and less than the greatest. The median of the three numbers is . What is their sum?

Solution

Question 17

Which of the cones listed below can be formed from a sector of a circle of radius by aligning the two straight sides?

Solution

Question 18

The plane is tiled by congruent squares and congruent pentagons as indicated. The percent of the plane that is enclosed by the pentagons is closest to

Solution

Question 19

Pat wants to buy four donuts from an ample supply of three types of donuts: glazed, chocolate, and powdered. How many different selections are possible?

Solution

Question 20

A regular octagon is formed by cutting an isosceles right triangle from each of the corners of a square with sides of length . What is the length of each side of the octagon?

Solution

Question 21

A right circular cylinder with its diameter equal to its height is inscribed in a right circular cone. The cone has diameter and altitude , and the axes of the cylinder and cone coincide. Find the radius of the cylinder.

Solution

Question 22

In the magic square shown, the sums of the numbers in each row, column, and diagonal are the same. Five of these numbers are represented by , , , , and . Find .

Solution

Question 23

A box contains exactly five chips, three red and two white. Chips are randomly removed one at a time without replacement until all the red chips are drawn or all the white chips are drawn. What is the probability that the last chip drawn is white?

Solution

Question 24

In trapezoid , and are perpendicular to , with , , and . What is ?

Solution

Question 25

How many positive integers not exceeding are multiples of or but not ?

Solution

Answer Keys