I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

How many letters are in the alphabet?

How far can you walk into the woods?

Where do fish keep their money?

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

Can you write down eight eights so that they add up to one thousand?

I have Rs.50 and I spend it in the way as below.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?