What brings you down but never up?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What is the word or phrase?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

What happened when the wheel was invented?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?