1. Our room was at the back of the hotel.

2. Our room was in the back of the hotel.
[Are both the same in meaning? Is 'our room' always inside the hotel?]

3. Our room was behind the hotel.
[Can we use this expression when our room is inside the hotel?]

4. The bakery was in back of the hotel.
[In this sentence, the bakery was out of the hotel, not inside the hotel, right?]

5. The bakery was in/at the back of the hotel.
[This sentence is different form #4. In this sentence, the bakery is inside the hotel, right?]

6. The bakery was behind the hotel.
[#6 is the same as #4. Am I right? Can #5 sometimes mean #6?]

Yes, 1 and 2 are the same.

3. No. Behind means the room is outside of the hotel.

4, Yes, it means it's outside of the hotel.

5. Yes, in/at the back of the hotel is inside.

6. Yes. It's outside.

1. "Our room was at the back of the hotel" and "Our room was in the back of the hotel" are generally used interchangeably and have the same meaning. They both imply that the room is located towards the back portion of the hotel building. These expressions typically imply that the room is inside the hotel.

2. Generally, when referring to "our room," it is assumed to be inside the hotel. However, it is important to note that context matters. If the sentence were to specify that "our room" is in a separate building behind the hotel, then it could indicate that the room is not inside the hotel itself.

3. "Our room was behind the hotel" suggests that the room is located at the back of the hotel, but it does not necessarily imply that it is inside the hotel. This phrase could be used to describe a situation where the room is located in a separate building or structure situated behind the hotel.

4. Correct, in the sentence "The bakery was in back of the hotel," the bakery is located outside the hotel, not inside it.

5. Yes, "The bakery was in/at the back of the hotel" implies that the bakery is inside the hotel, towards the back portion of it.

6. "The bakery was behind the hotel" is similar to sentence #4 and generally implies that the bakery is located outside the hotel. Sentence #5, on the other hand, suggests that the bakery is inside the hotel, towards the back portion. Although there can be some overlap in their meanings, it would depend on the context of the specific situation.