Sam, Tim, Liz, Ben, Jack, and Jerry are sitting in a row. Tim and Liz are…

Concept: In a linear seating puzzle, each stated constraint — extreme ends, center seats, and a directional (left/right) relation — fixes one or more seats. Anchor the row using the most restrictive clues first (ends and center), resolve a directional clue by testing each end position for feasibility, then place any remaining person in the one seat left by elimination.

1. There are 6 seats in the row, numbered 1 (leftmost) through 6 (rightmost). Positions 3 and 4 are the two center seats, and positions 1 and 6 are the two extreme ends.

2. Tim and Liz occupy the center, so they take positions 3 and 4 (their exact order between the two does not affect who sits next to Jerry).

3. Ben and Jerry occupy the extreme ends, so they take positions 1 and 6, in one of two orders.

4. Jack sits immediately to the right of Ben. If Ben were at position 6, there would be no seat to his right — impossible. So Ben must be at position 1, which puts Jerry at position 6.

5. With positions 1, 3, 4, and 6 fixed (Ben, Tim/Liz, Jerry), only positions 2 and 5 remain for Jack and Sam. Since Jack sits immediately to the right of Ben (position 1), Jack takes position 2, leaving Sam the one remaining seat, position 5.

6. Position 5 sits immediately to the left of position 6 (Jerry), so Sam is the person sitting immediately to Jerry's left.

Cross-check: the full row reads Ben (1) – Jack (2) – Tim/Liz (3, 4) – Sam (5) – Jerry (6). Every clue holds: Tim and Liz are centered, Ben and Jerry sit at the two ends, and Jack is immediately right of Ben — confirming Sam as the sole person adjacent to Jerry on the left.