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?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Which wheel of car does not rotate when you turn your car right?

How can you make number one disappear by adding something to it?

Can you count the number of matches in the picture below ?

Replace the question mark with the correct number in below Picture:

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?