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Maths Quiz for Class 8 Recognition of Solids |
In this post, we are providing 20 online maths quiz
questions for class 8 recognition of solids. Online maths quiz will take around
20 minutes to complete it.
Question 1: What is the Euler’s formula for polyhedrons?
A) E + F + G = 2
B) F + E – V = 2
C) F + V – E = 2
D) V + E – F = 2
Explanation: The correct Euler’s formula for polyhedrons is: F + V – E = 2.
Question 2: The number of edges in a triangular prism is ___________.
A) 9
B) 6
C) 3
D) 4
Explanation: A triangular prism has 9 edges.
Question 3: A drum looks in the shape of a _________.
A) cylinder
B) cube
C) cone
D) sphere
Explanation: A drum is in the shape of a cylinder.
Question 4: Which of the following shape is not a 2-D figure?
A) Square
B) Sphere
C) Triangle
D) Quadrilateral
Explanation: A sphere is not a 2-D figure. It is a 3-D figure.
Question 5: Which of the following 3-D figures has the least number of faces?
A) Triangular prism
B) Triangular pyramid
C) Square prism
D) Rectangular pyramid
Explanation: A triangular pyramid has the least number of faces, that is, 4.
Question 6: The front view of a cone is a ___________.
A) circle
B) square
C) triangle
D) rectangle
Explanation: The front view of a cone is a triangle.
Question 7: The side view of a cube is a ____________.
A) rectangle
B) square
C) triangle
D) circle
Explanation: The side view of a cube is a square.
Question 8: A line where two faces of a 3-D shape meet is called a/an __________.
A) vertex
B) face
C) corner
D) edge
Explanation: A line where two faces of a 3-D shape meet is called an edge.
Question 9: A plane surface enclosed by three or more edges is called a/an _________.
A) face
B) edge
C) vertex
D) point
Explanation: A plane surface enclosed by three or more edges is called a face.
Question 10: Find the odd one out of the following shapes.
A) Cube
B) Cuboid
C) Circle
D) Cylinder
Explanation: Circle is a 2-D shape, whereas the remaining are 3-D shapes.
Question 11: The number of vertices in a cube is ____________.
A) 6
B) 8
C) 12
D) 10
Explanation: The number of vertices in a cube is 8.
Question 12: The number of edges in a pentagonal prism is ____________.
A) 10
B) 15
C) 6
D) 7
Explanation: The number of edges in a pentagonal prism is 15.
Question 13: The number of faces in a cylinder is ___________.
A) 3
B) 2
C) 1
D) 0
Explanation: The number of faces in a cylinder is 3.
Question 14: Which of the following 3-D figures has the maximum number of faces?
A) Cylinder
B) Cone
C) Sphere
D) Cuboid
Explanation: A cuboid has the maximum number of faces, that is, 6.
Question 15: How many different cylinders can be made by using a rectangular sheet of paper?
A) 4
B) 3
C) 2
D) 1
Explanation: Two different cylinders can be made from a rectangular sheet of paper, one is by rolling along its length and another by rolling along its breadth.
Question 16: Which of the following is a platonic solid?
A) Cuboid
B) Cube
C) Cone
D) Cylinder
Explanation: A cube is a platonic solid.
Question 17: Which of the following is not a polyhedron?
A) Cylinder
B) Cube
C) Cuboid
D) Hexagonal prism
Explanation: A cylinder is not a polyhedron.
Question 18: A polyhedron has 4 faces and 4 vertices. How many edges does it have?
A) 4
B) 5
C) 6
D) 8
Explanation: Here, F = 4, V = 4 and E = ?. For a polyhedron, Euler’s formula states that, F + V – E = 2 => 4 + 4 – E = 2 => 8 – E = 2 => E = 8 – 2 => E = 6.
Question 19: A polyhedron has 20 faces and 30 edges. How many vertices does it have?
A) 10
B) 12
C) 14
D) 16
Explanation: Here, F = 20, E = 30 and V = ?. For a polyhedron, Euler’s formula states that, F + V – E = 2 => 20 + V – 30 = 2 => V = 2 + 30 – 20 => V = 12.
Question 20: A polyhedron has 12 edges and 6 vertices. How many faces does it have?
A) 12
B) 10
C) 8
D) 6
Explanation: Here, E = 12, V = 6 and F = ?. For a polyhedron, Euler’s formula states that, F + V – E = 2 => F + 6 – 12 = 2 => F = 2 + 12 – 6 => F = 8.
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