I look at you, you look at me I raise my right, you raise your left. What am I?

Be active and find the killer in the picture Riddle below.

I have Rs.50 and I spend it in the way as below.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

what one word does the below rebus identifies?