You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What occurs twice in a week, once in a year but never in a day?

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.

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?

I taste better than I can smell. Who am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

What is the next number in this matchsticks series riddle?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?