P, Q, R, S, and T have launched a new startup.Two of them are siblings. The office of the startup has just three rooms.All of them agree that the siblings shoul...

Forestland is a planet inhabited by different kinds of creatures. Among other creatures, it is populated by animals all of whom are ferocious. There are also cr...

Eight students (P, Q, R, S, T, U, V, and W) are playing musical chairs. The figure indicates their order of position at the start of the game. They play the gam...