When it's bad luck to meet a black cat?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Can you decipher the two rows to find the hidden word?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

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

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Different lights make me strange by changing me into different sizes. What am I?