Eight boys B1, B2, B3, B4, B5, B6, B7 and B8 are sitting in a row facing towards the north (not necessarily in the same order). B6 is fifth to the right of B1. B4 is fifth to the right of B5. B5 is to the immediate right of B1. B8 is third to the left of B4. B2 is third to the right of B7. B7 is an immediate neighbour of B1. Who is sitting on the immediate left of B1?

SSC GD Constable Exam Previous Years Question

Question: Eight boys B1, B2, B3, B4, B5, B6, B7 and B8 are sitting in a row facing towards the north (not necessarily in the same order). B6 is fifth to the right of B1. B4 is fifth to the right of B5. B5 is to the immediate right of B1. B8 is third to the left of B4. B2 is third to the right of B7. B7 is an immediate neighbour of B1.

Who is sitting on the immediate left of B1?

Options:

1. B6
2. B7
3. B2
4. B8

Answer:

Option 2: B7

Explanation:

Let's analyze the given information and create a seating arrangement!

 * B5 is to the immediate right of B1:

   B1 B5 _ _ _ _ _ _

 * B7 is an immediate neighbor of B1:

   B7 B1 B5 _ _ _ _ _

 * B6 is fifth to the right of B1:

   B7 B1 B5 _ _ B6 _ _

 * B4 is fifth to the right of B5:

   B7 B1 B5 _ _ B6 _ B4

 * B8 is third to the left of B4:

B7 B1 B5 _ _ B6 _ B4 B8

Now, we have two empty spaces left. The only two boys remaining are B2 and B3.

Since B2 is third to the right of B7, the final arrangement becomes:

B7 B1 B5 B2 B3 B6 _ B4 B8

Therefore, the final seating arrangement is:

B7 B1 B5 B2 B3 B6 B8 B4

From this, we can deduce that B7 must be to the left of B1, as B5 is already on his right.

Therefore, B7 is sitting on the immediate left of B1.