Math Quiz For Class 8 Students

Reviewed by Janaisa Harris

Janaisa Harris, BA (Mathematics) |

High School Math Teacher

Review Board Member

Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a bachelor's degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher.

, BA (Mathematics)

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Quizzes Created: 1 | Total Attempts: 117,151

Questions: 10 | Attempts: 117,151 | Updated: Sep 26, 2024

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Get ready to challenge your math skills with our comprehensive Math Quiz for Class 8. Designed specifically for eighth graders, this quiz covers a wide range of topics that are crucial at this stage of learning. From mastering the complexities of algebraic expressions and equations to diving deep into the intricacies of geometry and data interpretation, our quiz offers a robust review of all essential mathematical concepts.

Each question is crafted to not only test your knowledge but also to enhance your problem-solving skills, encouraging you to think critically and logically. This Math Quiz for Class 8 is ideal Read morefor students seeking to boost their grades, prepare for upcoming tests, or simply gain more confidence in their mathematical abilities. Engage with our interactive questions, get instant feedback, and track your progress as you learn.

Math Quiz for Class 8 Questions and Answers

1.

What is the result of 15 divided by 3 times 2 plus 5?
- A.
  
  20
- B.
  
  25
- C.
  
  15
- D.
  
  10
Correct Answer
C. 15

Explanation
To solve the expression 15 ÷ 3 x 2 + 5, we must follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)). In this case, we first perform the division: 15 ÷ 3 = 5. Next, we proceed with the multiplication: 5 x 2 = 10. Finally, we add 5 to get the result: 10 + 5 = 15.

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141
0
2.

Which term describes a polygon with all sides and angles equal?
- A.
  
  Regular
- B.
  
  Irregular
- C.
  
  Equilateral
- D.
  
  Quadrilateral
Correct Answer
A. Regular

Explanation
In geometry, a polygon with all sides and all angles equal is specifically termed a "regular polygon." It's important to differentiate this from "equilateral," which refers only to the equality of sides. A square, for example, is a regular polygon because it has both equal sides and equal angles, while a rhombus, with equal sides but potentially unequal angles, is not.

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161
3
3.

Simplify: (-3)^2
- A.
  
  6
- B.
  
  -9
- C.
  
  9
- D.
  
  -6
Correct Answer
C. 9

Explanation
When a negative number is squared, the result is always positive. This is because squaring a number involves multiplying it by itself. In the case of (-3)², we have (-3) x (-3). The multiplication of two negative numbers always yields a positive product, hence (-3)² = 9.

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105
3
4.

What is the prime factorization of 60?
- A.
  
  2^2 x 3 x 5
- B.
  
  2 x 3 x 5
- C.
  
  2^2 x 5
- D.
  
  3 x 5
Correct Answer
A. 2^2 x 3 x 5

Explanation
Prime factorization is the process of expressing a number as the product of its prime factors. To find the prime factorization of 60, we start by dividing it by the smallest prime number, 2. This gives us 30. We can divide by 2 again to get 15. 15 is divisible by 3, resulting in 5, which is a prime number. Therefore, the prime factorization of 60 is 2 x 2 x 3 x 5, which can be written more compactly as 2² x 3 x 5.

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105
1
5.

Calculate the area of a triangle with a base of 10 cm and a height of 14 cm.
- A.
  
  140 cm squared
- B.
  
  70 cm squared
- C.
  
  50 cm squared
- D.
  
  120 cm squared
Correct Answer
B. 70 cm squared

Explanation
Calculating the area of a triangle involves utilizing the formula: (1/2) x base x height. In this specific scenario, the triangle's base measures 10 cm and its height is 14 cm. Substituting these values into the formula, we obtain (1/2) x 10 cm x 14 cm. Simplifying this expression, we arrive at 5 cm x 14 cm, which ultimately yields 70 cm² as the area of the triangle.

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73
2
6.

Solve for x if 4x + 5 = 21.
- A.
  
  4
- B.
  
  3
- C.
  
  5
- D.
  
  2
Correct Answer
A. 4

Explanation
To determine the value of 'x' in the equation 4x + 5 = 21, we must isolate 'x' by employing inverse operations. Initially, we subtract 5 from both sides of the equation, resulting in 4x = 16. To fully isolate 'x', we divide both sides of the equation by 4, which ultimately yields x = 4.

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72
1
7.

What is the volume of a cube with side length 3 cm?
- A.
  
  9 cm cubed
- B.
  
  18 cm cubed
- C.
  
  27 cm cubed
- D.
  
  24 cm cubed
Correct Answer
C. 27 cm cubed

Explanation
Calculating the volume of a cube entails cubing the length of one of its sides, which is mathematically represented as side x side x side. In this instance, the cube possesses a side length of 3 cm. Therefore, its volume is computed as 3 cm x 3 cm x 3 cm, resulting in a volume of 27 cm³.

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65
0
8.

If the circumference of a circle is 31.4 cm, what is its diameter? (Use pi approximately equal to 3.14)
- A.
  
  10 cm
- B.
  
  5 cm
- C.
  
  20 cm
- D.
  
  15 cm
Correct Answer
A. 10 cm

Explanation
The relationship between a circle's circumference (C) and its diameter (d) is given by the formula C = πd, where π (pi) is a mathematical constant approximately equal to 3.14. To determine the diameter when the circumference is known, we rearrange the formula to d = C/π. Substituting the given circumference of 31.4 cm, we get d = 31.4 cm / 3.14 = 10 cm.

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62
0
9.

Convert 1500 milliliters to liters.
- A.
  
  1.5 liters
- B.
  
  15 liters
- C.
  
  0.15 liters
- D.
  
  150 liters
Correct Answer
A. 1.5 liters

Explanation
Within the metric system, units are interrelated by powers of 10. Specifically, 1 liter (L) is composed of 1000 milliliters (ml). Consequently, converting a quantity from milliliters to liters necessitates dividing the number of milliliters by 1000. In this case, 1500 ml ÷ 1000 yields 1.5 L.

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70
2
10.

What is the probability of rolling an even number on a standard six-sided die?
- A.
  
  1/2
- B.
  
  1/3
- C.
  
  2/3
- D.
  
  1/6
Correct Answer
A. 1/2

Explanation
The concept of probability is defined as the ratio of favorable outcomes to the total number of possible outcomes. A standard six-sided die features three faces displaying even numbers (2, 4, and 6) out of a total of six faces. Therefore, the probability of obtaining an even number upon rolling the die is 3/6, which can be simplified to 1/2.

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205
1

Janaisa Harris |BA (Mathematics) |

High School Math Teacher

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Current Version
Sep 26, 2024

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Oct 03, 2009

Quiz Created by
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Math Quiz For Class 8 Students

Math Quiz for Class 8 Questions and Answers

What is the result of 15 divided by 3 times 2 plus 5?

Which term describes a polygon with all sides and angles equal?

Simplify: (-3)^2

What is the prime factorization of 60?

Calculate the area of a triangle with a base of 10 cm and a height of 14 cm.

Solve for x if 4x + 5 = 21.

What is the volume of a cube with side length 3 cm?

If the circumference of a circle is 31.4 cm, what is its diameter? (Use pi approximately equal to 3.14)

Convert 1500 milliliters to liters.

What is the probability of rolling an even number on a standard six-sided die?