Download Our Android App

Google Play

7th Class Mental Ability Cube and Dice Cubes and Dice

Cubes and Dice

Category : 7th Class

 

 

Cuboid: Cuboid is a uniform solid which has 6 faces, 8 corners and 12 edges.

 

 

Cube: Cube is a cuboid which has identical faces.

 

 

Dice: A dice is a cube whose each face contains dots or numbers from 1 to 6.

 

 

EXAMPLE

 

 

1.  Count the number of cubes in the given figure.

      

(a) 8                              (b) 10                            (c) 12                            (d) 16

 

Explanation (b):

Number of cubes in the bottom layer = 6

Number of cubes in the middle layer = 3

Number of cubes in the topmost layer = 1

 Total number of cubes

So, the correct option is (b).

 

 

2.  Study the two positions of a dice given below. What number will be opposite to the face bearing number 2?

    

(a) 4                              (b) 3                              (c) 6                              (d) 5

 

Explanation (d):

First figure shows that faces bearing 1 and 3 are adjacent faces of the face bearing 2. So they cannot be opposite to 2.

From second figure:

3 is on the top. So 2 cannot be at the bottom.

1 is at the front. So 2 cannot be at the back.

Clearly, only one face of this (2nd figure) dice is remaining. Hence it must be 2.

Therefore, 5 is opposite to 2.

So, the correct option is (d).

 

 

3.  The sheet of paper shown in the fig. (X), is folded to form a box. Choose box(es) from the options, that is similar to the box(es) that are formed.

      

       (a) 2 and 3 only              (b) 1, 3 and 4 only          (c) 1, 2 and 3 only          (d) 1 and 4 only

 

Explanation (c):

After folding the fig. (X), we get the box whose opposite faces are:

No rotation of the box is formed appears as shown in the figure 4.

So, the correct option is (c).

Other Topics



LIMITED OFFER HURRY UP! OFFER AVAILABLE ON ALL MATERIAL TILL TODAY ONLY!

You need to login to perform this action.
You will be redirected in 3 sec spinner

Free
Videos