Seven different coloured books are kept one after the other. i. The RED book is just on the top of the ORANGE book. ii. The BLUE book is between the GREEN and the YELLOW books. iii. The VIOLET book is between the GREEN and the BLACK books. iv. There are as many books between the GREEN and the RED books as there are between the BLACK and the BLUE books. If the YELLOW book is on the top, which book is exactly in the middle?

Seven different coloured books are kept one after the other. i. The RED book is just on the top of the ORANGE book. ii. The BLUE book is between the GREEN and the YELLOW books. iii. The VIOLET book is between the GREEN and the BLACK books. iv. There are as many books between the GREEN and the RED books as there are between the BLACK and the BLUE books. If the YELLOW book is on the top, which book is exactly in the middle? Correct Answer VIOLET

Number of Books: 7

ii. The BLUE book is between the GREEN and the YELLOW books.

iii. The VIOLET book is between the GREEN and the BLACK books. Thus following two cases,

Shelf

Case I

Case II

7

Yellow

Black

6

Blue

Violet

5

Green

Green

4

Violet

Blue

3

Black

Yellow

2

   

1

   

 

iv. There are as many books between the GREEN and the RED books as there are between the BLACK and the BLUE books (here two).

i. The RED book is just on the top of the ORANGE book. Therefore, 

Shelf

Case I

Case II

7

Yellow

Black

6

Blue

Violet

5

Green

Green

4

Violet

Blue

3

Black

Yellow

2

Red

Red

1

Orange

Orange

 

Now, if the YELLOW book is on the top, then case I follow.

Here case II eliminated

Shelf

Case I

7

Yellow

6

Blue

5

Green

4

Violet

3

Black

2

Red

1

Orange

 

Hence, violet book is in the middle.

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