A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

An explorer goes on an exposition in the jungle. He sets up camp in the middle of the jungle. The next morning he sees something with a head and a tail, but he is not afraid. What did he see in his bag?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

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?

What does this rebus riddle means ?

The more it dries, the wetter it becomes. Can you tell what it is?

Can you name an animal whose killing cannot be performed without spilling your own blood?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?