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

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

Identify The phrase in the picture.

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

There are forty elephants and they have forty-fore heads. How can this be possible?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Which tank will fill first?

What is red and smells like blue paint?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?