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\ 10-Nov-2025 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

4. Based on the given figure, fill in the blanks. C

a. O is the ______ b. OB is the ______ B
c. OC is the ______ d. CD is the ______ O

D
5. Which of the following nets can give a cuboid?

a. b.

c. d.

Mental Maths

Choose the correct option.
21 st
Century #Critical Thinking
1. How many line segments are there in the given figure? Skills
a. 2 b. 4

c. 6 d. 8

2. How many rectangles are there in the figure shown alongside?

a. 1 b. 2

c. 3 d. 6

3. Which of the following is not a part of a circle?

a. Radius b. Diameter

c. Circumference d. Vertex

4. A solid with no vertex is a

a. Cube b. Cone c. Hemisphere d. Cuboid

5. Two cubes of the same size put together form a _________ .
a. Cube b. Cuboid c. Cone d. Sphere

6. Which of the following geometrical shapes is the smallest?
a. Line b. Point

c. Ray d. Line segment

130 Mathematics 4