Six students (L, M, N, O, P and Q) sit in a linear row

Solution

N sits third from extreme left end of row. One person sits between L and N.   P sits third to the right of O. 4. O doesn’t sit adjacent to M or Q. We get L sits either at extreme left or second from extreme right end of row. P sits at extreme left end of row. Either Q or M sits at extreme right end of row. The final arrangement is as follows: Either Q or M sits second to the left of O. P         Q/M     N         O         L          M/Q