What number when divided in half becomes zero?

There is a rock group of four men that do not sing. Name It?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

What can you serve, but never eat?

12345 a famous South Indian actor
567 is a path in jumbled form
8 & 10 are same letters
9 is one among the first six alphabets.
WHO AM I?

Identify the 10 differences between the two given pictures.

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?