Why is the Hole below a Lock?

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

A man is found dead with a knife in his back When the investigation is done. A chair lays beside him and the forensic team finds moisture around the body.

If he committed suicide, how did he do it?

What word is pronounced the same if you take away four of its five letters?

What number when divided in half becomes zero?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

Replace the question mark with the correct number below.

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

what does the below math rebus puzzle mean?

Can you identify if it's a murder or a suicide ?