I look at you, you look at me I raise my right, you raise your left. What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

If a wheel has 54 spokes, how many spaces are there between the spokes?

What occurs twice in a week, once in a year but never in a day?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

You can see it everyday, But cannot touch it at will. What is it?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

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