Setup

J, K, L, and M sit at the four corners of a square, facing the center.

Clues

1. J sits opposite L.
2. K sits immediately to the right of J.

Question

Who sits opposite K?

Answer

M sits opposite K.

Solution

1. Place J at one corner and L at the opposite corner.
2. Place K immediately to J's right.
3. The only remaining corner, opposite K, is M's.