What goes up but never comes down?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

A man plots the murder of his wife. His plan is full proof. Nobody saw them leaving their house. He stabbed her with a knife while driving. She died on the spot. He threw her body in a valley. He threw the knife carefully wiping his finger prints on a random garbage bin. Then he went back to his home and no one was watching him this time as well.

After an hour, he was called by the local police department who informed him that his wife was murdered. They asked him to reach the scene of crime immediately. But as soon as he arrived at the crime scene, he was arrested by them.

How did the police know that he himself is the murderer?

Do you know who was buried in John's tomb?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

If eleven plus two equals one, what does nine plus five equal?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What does below chemistry rebus means?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?