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?

What is at the end of a rainbow?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Different lights make me strange by changing me into different sizes. What am I?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Which fur should we be getting from the Lion?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

What you cannot hold but it is yours?

What's a single-digit number with no value?