Factors
Percents
Fractions
Perimeter And Area
Challenge Problems
100
What are the factors of 18?
1 , 2, 3, 6, 9, 18
100
If 40% of the circle is shaded, what percent is not shaded?
60%
100
What is 1/7 + 2/7 + 3/7?
6/7
100
What is the perimeter of a regular hexagon with a side of length 5?
30
100
At Euclid Middle School, the mathematics teachers are Miss Germain, Mr. Newton, and Mrs. Young. There are 11 students in Mrs. Germain's class, 8 students in Mr. Newton's class, and 9 students in Mrs. Young's class taking the AMC 8 this year. How many mathematics students at Euclid Middle School are taking the contest?
Given that these are the only math teachers at Euclid Middle School and we are told how many from each class are taking the AMC 8, we simply add the three numbers to find the total. 11 +8 +9 = 28.
200
What are the factors of 30?
1 , 2, 3, 5, 6, 10, 15, 30
200
Convert 0.75 to a percent
75%
200
What is 3 + 5/9 - 1 - 1/9
2 4/9
200
What is the area of a square with side of length 8?
64
200
If 
for a,b positive integers, then what is 
?
Substitute 
and 
into the expression for 
to get:
Thus, answer choice 
is correct.
300
Find the greatest common factor of 18 and 30
6
300
What is 0.086 as a percent?
8.6%
300
What is 1/2 of 1/3
1/6
300
If the area of a square is 169 square meters, how long is each side?
13 meters
300
The graph shows the price of five gallons of gasoline during the first ten months of the year. By what percent is the highest price more than the lowest price?
The highest price was in Month 1, which was $17. The lowest price was in Month 3, which was $10. 17 is 
of 10, and is 
more than 10. Therefore, the answer is 
400
What is the greatest common factor of 24 and 40?
8
400
Write 2/5 as a percent
40%
400
How many 3/4s are in 1?
4/3
400
If the perimeter of a regular decagon is 120, what is the length of one side?
12
400
What is the sum of the mean, median, and mode of the numbers 2, 3, 0, 3, 1, 4, 0, 3 ?
A.) 6.5 B.) 7 C.) 7.5 D.) 8.5 E.) 9
Putting the numbers in numerical order we get the list 
The mode is 
The median is 
The average is 
The sum of all three is 
500
List all the common factors of 12 and 20
1, 2, 4
500
What is 70% + 0.025 + 2.4% in percentage form?
74.9%
500
What is 4/7 x 2/3?
8/21
500
If the perimeter of a nonagon is 72 squared meters, what is the length of each side in feet?
8 meters x 3 feet/meter = 24 feet
500
Alice needs to replace a light bulb located 10 centimeters below the ceiling in her kitchen. The ceiling is 2.4 meters above the floor. Alice is 1.5 meters tall and can reach 46 centimeters above the top of her head. Standing on a stool, she can just reach the light bulb. What is the height of the stool, in centimeters?
Convert everything to the same unit. Since the answer is in centimeters, change meters to centimeters by moving the decimal place two places to the right.
The ceiling is 240 centimeters above the floor. The combined height of Alice and the light bulb when she reaches for it is 10 + 150 + 46 = 206 centimeters. That means the stool's height needs to be 240-206 = 34.