Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

What has many keys but can’t open a single lock?

Can you find a five letter word that is left with only two letters if one is removed?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

What does an Island and the letter T have in common?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

What do you get if you add 2 to 100 four times?