What's the only room from which no one can enter or leave

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

what does this below rebus represent identXQQQQQME

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

When we see 2 but call 10?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Which alphabet letter is a question?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

What number should come in place of the question mark below?