When monkey rotate the gear, which mark will be hit 1 or 2 ?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

How can one talk without saying a single word?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Can you solve the below geography rebus by decoding the below rebus ?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What does this rebus mean?

O
N
C
E
TIME

What runs around the whole yard without moving?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?