In this type of arrangement, we have to place the objects or persons in a straight line according to the information given in the question.

**Example (1):** Five students P, Q, R, S, and T are standing in a row. S is on the right of T. Q is on the left of T but on the right of P. S is on the left of R, who is standing on the extream right. Find, who is standing in the middle of the row?

**Solution:** Follow the information given in the question step by step and draw the figure.**Step(1):** S is on the right of T.**Step(2):** Q is on the left of T but on the right of P.**Step(3):** S is on the left of R and R is standing on the entrance right.

Hence, according to the picture, T is standing in the middle of the row.

**Example (2):** Six boys A, B, C, D, E, and F are sitting in two rows with three boys in each row. Both the rows are in front of each other. E is not at the end of any row. D is second to the left of F. C is the neighbour E and diagonally opposite to D. B is the neighbour of F. Find, who is sitting in front of B?

**Solution:** Follow the information given in the question step by step and draw the figure.**Step(1):** There are two rows (facing each other).**Step(2):** E is not at the end of any row.**Step(3):** D is second to the left of F.**Step(4):** C is the neighbour of E and diagonally opposite to D.**Step(5):** B is the neighbour of F.

Hence, according to the picture, E is sitting in front of B.