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Class 8 Maths MCQs (Multiple Choice Questions) with solutions are provided here, chapter by chapter (from Chapter 1 to 16). The objective questions are based on the NCERT curriculum and the most recent CBSE syllabus (2020-2021). By practising these questions, students will be able to quickly review all of the concepts covered in each chapter and prepare for the final exams. We've also included extensive explanations for all of the issues so that students may double-check their responses. These multiple-choice problems cover all of the major subjects discussed in each chapter, allowing students to master the whole curriculum in preparation for their exams.
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Class 8 MCQs
Ques. Find the product of 2/9 and ¾?
- 1/6
- 2/9
- 1/9
- 1/4
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Ans. A. 1/6
Explanation: The product of 2/9 and 3/4 is:
⇒ 2/9 x 3/4
⇒ (2 x 3) / (9 x 4)
⇒ (2 x 3) / (3 x 3 x 2 x 2)
By removing the common terms from the numerator and denominator, we get;
⇒ 1 / (3 × 2)
⇒ 1/6
Ques. A rectangle's perimeter is 20 cm. If the rectangle's length is 6 cm, then its width will be:
- 4 cm
- 6 cm
- 10 cm
- 4 cm
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Ans. A. 4 cm
Explanation: Perimeter of rectangle = 2 (Length + Breadth)
20 = 2 (6 + x)
6 + x = 20/2
6 + x = 10
x = 10 - 6
x = 4 cm
Ques. A parallelogram with parallel sides of lengths 12 cm and 7 cm has a perimeter of:
- 21 cm
- 42 cm
- 19 cm
- 38 cm
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Ans. D. 38 cm
Explanation: Perimeter of parallelogram is given as 2 x Sum of parallel sides
P = 2 (12 + 7)
P = 2 (19)
P = 38 cm
Ques. We need to know _____ to make a rectangle.
- All of the internal angles
- All Sides
- Only the length and width are important
- Just one angle measure
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Ans. C. Only the length and width are important
Explanation: The parallel sides of a rectangle are all of the same length, and all the inside angles are 90 degrees. As a result, if the length and width of the rectangle are known, we can easily create it.
Ques. What is the possibility of getting a tail if a coin is flipped in the air?
- 0
- 1/2
- 1
- 2
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Ans. B. 1/2
Explanation: The heads and tails of a coin are the two sides. Number of conceivable outcomes divided by number of outcomes equals probability. We know that one side of a coin has the tail, and that there are two possible outcomes: H and T. As a result, the chance of having a tail is equal to 1/2 percent.
Probability = No. of favourable outcomes / Total outcomes
= 1 / 2
Ques. Find the largest four-digit figure that is a square.
- 9990
- 9801
- 9999
- None
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Ans. B. 9801
Explanation: The number 9801 is a perfect square.
Perfect squares are the numbers which we get after multiplying two same integers, for example, 9 = 3 3.
Ques. To create a perfect cube, what number can we divide 135 by?
- 3
- 5
- 7
- 9
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Ans. B. 5
Explanation: 3 × 3 x 3 x 5 = 135
As can be seen, 5 is the excess number in a group of three that cannot be paired.
As a result, 135/5 = 27.
Ques. If half of the pupils in a class of 20 are skilled at science. The number of pupils who are good at science is then:
- 10
- 15
- 5
- 11
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Ans. A. 10
Explanation: 50 percent of 20 students = 50% of 20
= (50/100) x 20
= ½ x 20
= 10
Ques. Is it able to discover the additive inverse of 11/7?
- 7/11
- -7/11
- 11/7
- -11/7
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Ans. D. -11/7
Explanation: When we add a number to its own additive inverse, we get zero.
11/7 – 11/7 = 0
Ques. (-10/3) x (-15/2) x (17/19) x 0 is equal to:
- 0
- 22.66
- 20
- 35
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Ans. A. 0
Explanation: Zero multiplied by any number equals zero.
Ques. a × (b × c) = (a × b) × c is the abbreviation for:
- associative law for addition
- associative law for multiplication
- commutative law for addition
- commutative law for multiplication
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Ans. B. associative law for multiplication
Explanation: a + (b + c) = (a + b) + c, and a (bc) = (ab) c are two associative principles in mathematics related to number operations of addition and multiplication. While associativity is true for ordinary arithmetic using real or imaginary numbers, it does not hold true for some applications, such as non-associative algebras.
Ques. When we multiply 7xy + 5yz – 3zx, 4yz + 9zx – 4y, and –3xz + 5x – 2xy, we get?
- 5xy + 9yz +3zx + 5x – 4y
- 5xy – 9yz +3zx – 5x – 4y
- 5xy + 10yz +3zx + 15x – 4y
- 5xy + 10yz +3zx + 5x – 6y
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Ans. A. 5xy + 9yz +3zx + 5x – 4y
Explanation: 7xy + 5yz – 3zx, 4yz + 9zx – 4y, and –3xz + 5x – 2xy are the given values.
If we join the three phrases together, we'll need to combine the terms that are similar.
(7xy – 2xy) + (5yz + 4yz) – 3zx + 9zx – 3xz – 4y + 5x
= 5xy + 9yz + 3zx + 5x – 4y
Ques. Which of the following is the same as the number X3?
- X8 - X5
- X8 . X5
- X7 / X4
- (X8)3
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Ans. C. X7 / X4
Explanation: We know that,
X7 / X4 = X7-4
= X3
Ques. What does a cone's top view look like?
- A circle
- A square
- A rectangle
- A triangle
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Ans. A. A circle
Explanation: The right cone's base is always circular. When viewed from the top, it seems to be a circle, with the vertex serving as the circle's centre.
Ques. A trapezium has a surface area of 480 cm2, a distance of 15 cm between two parallel sides, and a distance of 20 cm between one parallel side. What is the opposite side?
- 20 cm
- 34 cm
- 44 cm
- 50 cm
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Ans. C. 44 cm
Explanation: Area of a trapezium is given as ½ h (a+b)
Here, a = 20 cm, h = 15 cm, Area = 480 sq.cm
480 = ½ (15) (20 + b)
20 + b = (480 x 2)/15
20 + b = 64
Therefore, b = 44 cm
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