Which word does the below Plexor means ?

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

Can you find out the remainder when 3^300 is divided by 5?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Prove that the below maths equation is true.

8 + 8 = 91

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)