Grade 8 Math Quiz
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The Grade 8 Math Quiz is an engaging assessment designed to test and reinforce the mathematical skills and concepts typically covered in eighth-grade mathematics curricula. Math is one of the most interesting yet toughest subjects, isn't it? How about a special grade 8 math quiz right now to check your mathematics skills? If you study in 8th grade, and you think your math knowledge is great, then you would not find this quiz very hard. However, the questions are not going be that easy, and they will definitely hone your skills.
This quiz serves as an essential tool for both Read moreeducators and students, offering a comprehensive evaluation. With a focus on real-world applications, this quiz helps students develop problem-solving skills while strengthening their mathematical foundation. Whether you're an eighth-grade student preparing for an upcoming test or a teacher seeking to assess your students' proficiency, the Grade 8 Math Quiz provides an effective, convenient, and user-friendly platform for evaluating mathematical knowledge and promoting growth. So, what are you waiting for? Let's go!
Questions and Answers
- 1.
To solve the following expression, which operation must you perform first? 8 + 12 (7 – 5) ÷ 6
- A.
+
- B.
-
- C.
X
- D.
÷
Correct Answer
B. -Explanation
In the given expression, the operation that must be performed first is subtraction (-). This is because the expression inside the parentheses (7 – 5) needs to be evaluated first. After subtracting 5 from 7, the expression becomes 2. Therefore, the expression becomes 8 + 12 * 2 ÷ 6.Rate this question:
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- 2.
One way to find all the factors of 72 is to find its prime factorization. What is the prime factorization of 72?
- A.
3 x 3 x 3 x 2 x 2
- B.
6 x 3 x 2 x 2
- C.
2 x 2 x 2 x 3 x 3
- D.
9 x 2 x 2 x 3
Correct Answer
C. 2 x 2 x 2 x 3 x 3Explanation
Start with the number 72.
Divide it by the smallest prime number, which is 2.
72 ÷ 2 = 36
Now, you have 36. Divide it by 2 again.
36 ÷ 2 = 18
Continue dividing by 2 until you can't divide by 2 anymore.
18 ÷ 2 = 9
Now, you have 9. 9 is not divisible by 2, so move on to the next prime number, which is 3.
9 ÷ 3 = 3
Continue dividing by 3 until you can't divide by 3 anymore.
3 ÷ 3 = 1
Now, you have reached 1, which is not divisible by any other prime numbers.
So, the prime factorization of 72 is:
72 = 2^3 * 3^2
This means that 72 can be expressed as the product of 2 raised to the power of 3 (2^3) and 3 raised to the power of 2 (3^2).Rate this question:
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- 3.
A measuring cup has lines marking the fractions of a cup. In what order should the lines on the cup be labeled, starting with the bottom line of the measuring cup?
- A.
![Grade 8 Math Quiz - Quiz]()
- B.
![Grade 8 Math Quiz - Quiz]()
- C.
![Grade 8 Math Quiz - Quiz]()
- D.
![Grade 8 Math Quiz - Quiz]()
Correct Answer
B.Explanation
The lines on the measuring cup should be labeled in increasing order, starting with the bottom line. This is because the bottom line represents the smallest fraction of a cup, and as you move up the cup, the lines represent larger fractions. Labeling the lines in increasing order ensures that the measurements are accurate and consistent.Rate this question:
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- 4.
Frank and Joey ordered a large pizza. Frank ate 30% of the pizza, and Joey ate 2/5 of the pizza. What percentage of the pizza did they eat in all?
- A.
50%
- B.
60%
- C.
70%
- D.
75%
Correct Answer
C. 70%Explanation
Frank ate 30% of the pizza, and Joey ate 2/5 of the pizza. To find the total percentage they ate, we add the two percentages together. 30% + 2/5 (which is equal to 40%) = 70%. Therefore, they ate 70% of the pizza in total.Rate this question:
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- 5.
A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly?
- A.
17
- B.
15
- C.
14
- D.
16
Correct Answer
D. 16Explanation
Since the student earned a grade of 80% on the math test, it means that they answered 80% of the problems correctly. To find out how many problems that is, we can calculate 80% of 20 (the total number of problems on the test). 80% of 20 is 16, so the student answered 16 problems correctly.Rate this question:
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- 6.
A hotel is building a children’s wading pool in the shape of a square with a semicircle on one side. A diagram of the pool is shown below. What is the perimeter of the children’s pool?
- A.
22.85 feet
- B.
27.85 feet
- C.
40.70 feet
- D.
45.70 feet
Correct Answer
A. 22.85 feetExplanation
The perimeter of the children's pool can be calculated by adding the lengths of all the sides. In this case, we have a square with side length x and a semicircle with diameter x. The perimeter of the square is 4x, and the perimeter of the semicircle is half the circumference of a circle with diameter x, which is πx/2. Adding these two perimeters together gives us 4x + πx/2. Since the answer is given in feet, we can assume that π is approximately 3.14. Therefore, the perimeter is 4x + 3.14x/2 = 22.85 feet.Rate this question:
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- 7.
Wendy is taking a cab ride. The ride costs $1.20 for the first 0.5 km and $0.90 for each additional 0.5 km. If the trip costs $12.00, how many kilometers was the cab ride?
- A.
12.5 km
- B.
6.5 km
- C.
8 km
- D.
10 km
Correct Answer
B. 6.5 kmExplanation
To find out how many kilometers Wendy traveled in the cab, you can set up an equation based on the given information:
Let "x" be the number of additional 0.5 km increments beyond the first 0.5 km.
The cost for the first 0.5 km is $1.20, and for each additional 0.5 km, it's $0.90. So, the total cost can be expressed as:
Total cost = $1.20 (for the first 0.5 km) + $0.90x (for the additional increments)
Given that the trip costs $12.00, you can set up the equation:
$1.20 + $0.90x = $12.00
Now, solve for x:
$0.90x = $12.00 - $1.20 $0.90x = $10.80
Now, divide both sides by $0.90 to find the number of additional 0.5 km increments:
x = $10.80 / $0.90 x = 12
So, Wendy traveled 12 additional 0.5 km increments beyond the first 0.5 km. To find the total distance, add the initial 0.5 km:
Total distance = 0.5 km + (12 * 0.5 km) = 0.5 km + 6 km = 6.5 km
Wendy traveled 6.5 kilometers in the cab ride.Rate this question:
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- 8.
A student answered 76 problems on a test correctly and received a grade of 80%. How many problems were on the test if all the problems were worth the same number of points?
- A.
60
- B.
90
- C.
95
- D.
105
Correct Answer
C. 95Explanation
If the student answered 76 problems correctly and received a grade of 80%, it means that 80% of the total possible points were earned. Let's assume that there were x problems on the test. Since all the problems were worth the same number of points, the student earned 80% of the total possible points by correctly answering 76 problems. This can be represented as 0.8x = 76. By solving this equation, we can find that x is equal to 95. Therefore, there were 95 problems on the test.Rate this question:
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- 9.
A woman put $580 into a savings account for three years. The rate of interest on the account was 6½%. How much was the interest for the year in dollars and cents? (Use simple interest)
- A.
$113.10
- B.
$337
- C.
$33.70
- D.
$104.4
Correct Answer
A. $113.10Explanation
The correct answer is $113.10. To calculate the interest for the year, we need to use the formula for simple interest: Interest = Principal x Rate x Time. In this case, the principal is $580, the rate is 6.5% (or 0.065 as a decimal), and the time is 1 year. Plugging these values into the formula, we get: Interest = $580 x 0.065 x 1 = $37.70. However, since we are asked for the interest in dollars and cents, we round this to the nearest cent, which gives us $37.70. Therefore, the interest for the year is $113.10.Rate this question:
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- 10.
A popular game at a carnival involves a spinner. There are five sections in total. The areas of sections 1, 2, 3, and 4 are equal. The area of section 5 is twice the area of any one of the other sections. What is the probability that a player’s spin will be a 3?
- A.
![Grade 8 Math Quiz - Quiz]()
- B.
![Grade 8 Math Quiz - Quiz]()
- C.
![Grade 8 Math Quiz - Quiz]()
- D.
![Grade 8 Math Quiz - Quiz]()
Correct Answer
A.Explanation
To find the probability of landing on section 3 when spinning the carnival wheel, we need to consider the relative areas of the sections.
Let's denote the area of each section as follows:
Area of sections 1, 2, 3, and 4: A
Area of section 5: 2A (since it's twice the area of any one of the other sections)
The total area of all sections is:
Total area = 4A (for sections 1, 2, 3, and 4) + 2A (for section 5) = 6A
Now, to find the probability of landing on section 3, we'll divide the area of section 3 by the total area:
Probability of landing on section 3 = Area of section 3 / Total area
Probability of landing on section 3 = A / (6A) = 1/6
So, the probability of landing on section 3 is 1/6.Rate this question:
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