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

What does this mean?

CCCCCCC

What is red and smells like blue paint?

With the help clues provided in the image, can you find the 5 digit key?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

What has one eye, but can’t see?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Vin Diesel is pulling a theft and has planned to run away with all the cash kept in the safe. But the only way to open the safe is the 13 character password. He has a set of five clues given to him by a trustworthy source.

Exactly two of the below statements are false.
The password is contained within this sentence.
The password is not in this hint.
The password is within only one of these statements.
At least one of the above statements is a lie.