I shave every day, but my beard stays the same. What am I?

What has a bottom at the top?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

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

What always comes into a house through the keyhole?

I can be cracked, made, told, and played. What am I?

You can hear me, but you can't touch or see me.

What am I?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?