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Test: Cubes & Cuboids - 2 - CAT MCQ


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15 Questions MCQ Test - Test: Cubes & Cuboids - 2

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Test: Cubes & Cuboids - 2 - Question 1

Directions to Solve

The following questions are based on the information given below:

  1. All the faces of cubes are painted with red colour.
  2. The cubes is cut into 64 equal small cubes.

Question -

How many small cubes are there whose three faces are coloured ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 1

Number of small cubes having three faces coloured = No. of corners = 8

Test: Cubes & Cuboids - 2 - Question 2

Directions to Solve

The following questions are based on the information given below:

  1. All the faces of cubes are painted with red colour.
  2. The cubes is cut into 64 equal small cubes.

Question -

How many small cubes are there whose two adjacent faces are coloured red ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 2

Number of small cubes having two adjacent faces coloured red = (x - 2) x No. of edges

= (4 - 2) x 12

= 24

Test: Cubes & Cuboids - 2 - Question 3

Directions to Solve

The following questions are based on the information given below:

All the opposite faces of a big cube are coloured with red, black and green colours. After that is cut into 64 small equal cubes.

Question -

How many small cubes are there whose no faces are coloured ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 3

Number of small cubes having no face coloured = (x - 2)3

= (4 - 2)3

= 8

Test: Cubes & Cuboids - 2 - Question 4

Directions to Solve

The following questions are based on the information given below:

All the opposite faces of a big cube are coloured with red, black and green colours. After that is cut into 64 small equal cubes.

Question -

How many small cubes are there whose 3 faces are coloured ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 4

Number of small cubes having three faces coloured = 1 at each corner

= 1 x 8

= 8

>

Test: Cubes & Cuboids - 2 - Question 5

Directions to Solve

The following questions are based on the information given below:

All the opposite faces of a big cube are coloured with red, black and green colours. After that is cut into 64 small equal cubes.

Question -

How many small cubes are there whose only one face is coloured ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 5

Number of small cubes having only one face coloured = 4 from each face

= 4 x 6

= 24

Test: Cubes & Cuboids - 2 - Question 6

Directions to Solve

The following questions are based on the information given below:

All the opposite faces of a big cube are coloured with red, black and green colours. After that is cut into 64 small equal cubes.

Question -

How many small cubes are there whose at the most two faces are coloured ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 6

Number of small cubes having two faces coloured = 8 + 8 + 4 + 4 = 24

and Number of small cubes having only one face coloured = 4 x 6 = 24

and Number of small cubes having no face coloured = 4 + 4 = 8

Therefore, total number of small cubes whose at the most two faces are coloured = 24 + 24 + 8 = 56.

Test: Cubes & Cuboids - 2 - Question 7

Directions to Solve

All the faces of a cube are painted with blue colour. Then it is cut into 125 small equal cubes.

Question -

How many small cubes will be formed having only one face coloured ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 7

No. of small cubes having only one face coloured = (5 - 2)2 x 6

= 9 x 6

= 54

Test: Cubes & Cuboids - 2 - Question 8

Directions to Solve

All the faces of a cube are painted with blue colour. Then it is cut into 125 small equal cubes.

Question -

How many small cubes will be formed having no face coloured ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 8

No. of small cubes having no face coloured = (x - 2)3

= (5 - 2)3

= 27

Test: Cubes & Cuboids - 2 - Question 9

Directions to Solve

All the six faces of a cube of a cube are coloured with six different colours - black, brown, green, red, white and blue.

  1. Red face is opposite to the black face.
  2. Green face is between red and black faces.
  3. Blue face is adjacent to white face.
  4. Brown face is adjacent to blue face.
  5. Red face is in the bottom.

Question -

The upper face is _________

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 9

Test: Cubes & Cuboids - 2 - Question 10

Directions to Solve

All the six faces of a cube of a cube are coloured with six different colours - black, brown, green, red, white and blue.

  1. Red face is opposite to the black face.
  2. Green face is between red and black faces.
  3. Blue face is adjacent to white face.
  4. Brown face is adjacent to blue face.
  5. Red face is in the bottom.

Question -

Which face is opposite to green ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 10

Test: Cubes & Cuboids - 2 - Question 11

Directions to Solve

All the six faces of a cube of a cube are coloured with six different colours - black, brown, green, red, white and blue.

  1. Red face is opposite to the black face.
  2. Green face is between red and black faces.
  3. Blue face is adjacent to white face.
  4. Brown face is adjacent to blue face.
  5. Red face is in the bottom.

Question -

Which of the following is adjacent to green ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 11

Test: Cubes & Cuboids - 2 - Question 12

Directions to Solve

There are 128 cubes with me which are coloured according to two schemes viz.

  1. 64 cubes each having two red adjacent faces and one yellow and other blue on their opposite faces while green on the rest.
  2. 64 cubes each having two adjacent blue faces and one red and other green on their opposite faces, while red on the rest. They are then mixed up.

Question -

How many cubes have at least two coloured red faces each ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 12

64 and 64 cubes of both types of cubes are such who have at least two coloured faces red each.

Therefore, total number of the required cubes is 128.

Test: Cubes & Cuboids - 2 - Question 13

Directions to Solve

There are 128 cubes with me which are coloured according to two schemes viz.

  1. 64 cubes each having two red adjacent faces and one yellow and other blue on their opposite faces while green on the rest.
  2. 64 cubes each having two adjacent blue faces and one red and other green on their opposite faces, while red on the rest. They are then mixed up.

Question -

What is the total number of red faces ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 13

No. of red faces among first 64 cubes = 128

No. of red faces among second 64 cubes = 192

Therefore, total number of red faces = 128 + 192 = 320

Test: Cubes & Cuboids - 2 - Question 14

Directions to Solve

There are 128 cubes with me which are coloured according to two schemes viz.

  1. 64 cubes each having two red adjacent faces and one yellow and other blue on their opposite faces while green on the rest.
  2. 64 cubes each having two adjacent blue faces and one red and other green on their opposite faces, while red on the rest. They are then mixed up.

Question -

Which two colours have the same number of faces ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 14

First 64 cubes are such each of whose two faces are green and second 64 cubes are such each of whose two faces are blue.

Therefore, green and blue colours have the same number of faces.

Test: Cubes & Cuboids - 2 - Question 15

Directions to Solve

There are 128 cubes with me which are coloured according to two schemes viz.

  1. 64 cubes each having two red adjacent faces and one yellow and other blue on their opposite faces while green on the rest.
  2. 64 cubes each having two adjacent blue faces and one red and other green on their opposite faces, while red on the rest. They are then mixed up.

Question -

How many cubes have two adjacent blue faces each ?

Detailed Solution for Test: Cubes & Cuboids - 2 - Question 15

Second 64 cubes are such each of whose two faces are blue.

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