Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

What word begins and ends with an E, but has only one letter?

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

Count the squares in the matchstick puzzle below?

You need to move three matchsticks to form three squares. Can you do it?

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

Who can jump higher than a Mountain?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?