Five families live on five different floors of a building, numbered 1 at the bottom to 5 at the top. The Sharmas live above the Guptas but below the Iyers. The Menons live on the top floor. The Bahls live on the floor immediately below the Guptas. On which floor do the Sharmas live?

The Menons take floor 5, leaving floors 1 to 4 for the rest. Since the Bahls are immediately below the Guptas, the Guptas cannot be on floor 1. If the Guptas were on floor 3, the Bahls would be on 2 and the Sharmas and Iyers would have to fit above floor 3 within floors 1 and 4 — impossible, as the Iyers would need a floor above the Sharmas' floor 4. If the Guptas were on floor 4, there would be no room above for both the Sharmas and the Iyers. So the Guptas are on floor 2, the Bahls on floor 1, and floors 3 and 4 go to the Sharmas and the Iyers in that order: Sharmas on 3, Iyers on 4. The traps: the first floor is the Bahls', the second the Guptas' and the fourth the Iyers' — each is a neighbour in the same chain of clues.