If two's company, and three's a crowd, then whats four and five ?

What can you serve, but never eat?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

What is the coolest letter in the alphabet?