Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Can you solve below mathematical equation?

2^1234 - 2^1233

Using Only Five 5's and any mathematical operator make sum as 37

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

There is a family that live in a round house. The two parents go out for a movie and leave a babysitter to watch their son. They come back and the kid was not there. Some one kidnapped him. The maid said she was cleaning in a corner. The cook said he was making pizza. The babysitter said she was getting a board game. Who kidnapped him.

What has 13 hearts but no other organs?

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

Can you divide the below-given shape into four equal and identical pieces?